Archive for September, 2008

How to Recover Lost Files

Tuesday, September 30th, 2008

Computers are usually fairly reliable, and files stored on them are relatively safe-however, it’s very essential to back up your files, just in case. If you are certain that your files have been deleted, then don’t worry! Your files can be found once again if you use the appropriate file recovery software. As long as quickly take steps to remedy it once you find that the files are missing, then you will most likely be successful. Even if your files have been overwritten or corrupted, or if you’ve lost the files but don’t know how that happened, it should still be possible to recover your lost files.

We’re going to focus mostly on deleted files. If you deleted a file, it is usually not erased from the hard disk-it’s instead moved to the Recycle Bin. If the file is in the recycle bin, it can be recovered with very little problem at all, so the first place that you’ll ever want to look for a deleted file is the Recycle Bin. However, if you’ve emptied out the Recycle Bin, or somehow deleted the file to bypass the bin, don’t panic, because the file will usually still be recoverable. When you delete a file from the Recycle Bin, then that clears up disk space for you to use; however, since you don’t immediately need or reuse that disk space, the file that you deleted from the Recycle Bin will still be there, unless you’ve used up the space it occupied. Thus, unless the disk space is reused, the data that used to exist there (or the file you’re looking for) will most likely still be intact.

There’s a common misconception that the “System Restore” program will recover deleted files, but this is untrue. System Restore will help you restore system files back to its original state (which is useful when an update of software, or an installation, has had an unpleasant effect on the system), but it will not change your files, because it would be quite irritating if you used System Restore, and then it removed all of your newly created documents, letters, and files, and recovered the old ones to restore the computer to the state it was in a few days ago. That would be no help at all!

Unless your hard disk was erased, the chances of recovery are pretty high as long as you are trying to recover a fairly recent file and have not yet used up the once-occupied file space. However, the chances of recovery decrease the longer you leave the file deleted, because you’ll be more likely to have used up the disk space; also, if you have done a disk defragmentation since the file has been deleted, the chances for recovery are severely decreased. In order to undelete the file, you will need to use a third-party recovery software (not included with Windows) such as DiskInternals Uneraser, which is a very powerful program that has a viewer that allows you to see recoverable files before recovering them. Using this, you should be able to successfully recover your lost files, given that not too much time has passed.

How to Recover Lost Digital Photos

Wednesday, September 24th, 2008

Digital photos are becoming more common these days as digital cameras allow people to skip out on film. However, digital photos require storing on the computer, and that’s a generally less safe option than film, because film is physical and is sure to be there. Unfortunately, therefore, digital prints can end up lost or accidentally deleted. Because the digital camera stores only one copy of the pictures, you want to copy, not cut, pictures out of the camera; this way, you’ll have a set of backup files still in the camera in case you mess up a bit in real life, and delete something accidentally.

If, however, you do end up losing a few of the pictures, and you want to get them back, the process isn’t actually so bad. If you accidentally deleted a picture while going through and looking at your pictures, the photo should be in the Recycling Bin when you first go look for it. When deleting, always change your settings to delete into the Recycling Bin; in the future, in case something goes wrong with deletion, there is at least a way for recovery. If for some reason, the photos are not on the hard disk, you can use certain software such as Flash Recovery in order to find it again. If you delete the file by accident and it’s not on the recycling bin, you can use the separate software known as Uneraser to recover the file.

Sometimes, however, you burn an image to a CD and, for some reason, the CD can no longer be read. This happens when the CD is corrupted or perhaps the burning of the CD did not work very well, or the file system makes the CD unreadable due to the software. In any case, if you are burning a CD of digital images, it is best to burn one full disk at a time; otherwise, you run a greater risk of corrupting the compact disc.

But don’t worry-just because your CD is corrupt does not mean that your files are not recoverable or lost forever. Indeed, there are plenty of programs that allow you to recover files from a broken CD. A CD and DVD recovery tool such as CD & DVD Recovery is specialized for reading the file system on the compact disc, and can bypass the many problems that usually occur and keep Windows from accessing the CD files. In this way, this software is more likely to find lost images, and thus more likely to recover them without corrupting them.

However, it’s really best to avoid this problem with CDs in the future-if you have photos that you value a lot, burn two copies and don’t delete them from the computer until you make certain that both copies work. Try to burn one CD at a time, and not multiple session CDs. Also, don’t use rewritable CDs, because those are more easily corrupted. While photo recovery may be fairly simple with the right software, you can’t guarantee a recovery-so avoid the problem in the first place!

Data Recovery: What Causes Data Loss and How to Recover Lost Files

Wednesday, September 17th, 2008

Data loss and the subsequent hassles of retrieving the lost data is every person’s nightmare. Although storing data on your computer may seem the optimal solution, there is always a chance that an accident may happen and all of your data may be lost. It is here that data recovery and its many tools play an important role.

Basic Causes For Data Loss

The most commonly stated causes for total loss of data are:

  • Operating system failure
  • Mechanical malfunctioning of the hard drive and
  • Software failure

An operating system failure is shown as a failure in recognizing the operating system and is manifested at startup as a Disk Boot Failure error message. To rectify this problem, boot your PC from the floppy disc or CD. Once the A:> prompt appears on your screen, change drives by switching to C: and list the data on your hard drive by entering “dir”. Take a backup of any critical data and then reinstall your operating system.

Generally mechanical malfunctioning of the hard drive gives warning signals by making unexpected noises in the process of data access. Such a situation is normally due to mechanical failure of any one of the components of the hard drive. When this happens, data recovery should be undertaken by the manufacturer rather than attempting to service the machine yourself.

Software failure is usually a problem with the software that is connected to the hard drive which is commonly caused because the backup battery on the motherboard dies. The settings on the PC that control the hard drive are lost. Data recovery in this case can be done by replacing the battery on the motherboard and then manually re-entering the settings at boot-up.

How Can Data Recovery Be Done Effectively
Data recovery is a specialized process which has to be carried out with the correct techniques as well as the right software and hardware. In almost 90% to 100% of the cases, there is complete recovery of lost data from a defective hard drive. If the fault lies with the electronic control panel, it can be easily rectified by replacing it. Data recovery is slightly more difficult in the case of a mechanical fault. Any problem related to the file system is recoverable using data recovery software. If there is any physical damage to the drives, they will need to be sent to a specialist for recovery.

Helpful Tips For Effective Data Recovery

  • Use recognized software tools for data recovery. Make enquiries about the proper software either through friends or with online research on Google on data recovery software.
  • Hard disk irregularities which are manifested as unusual or rattling sounds may need data recovery services of specialists.
  • In the event of a hardware crash, never try to save or recover the data as this may lead to loss of other saved data as well. Instead, try normal shut down procedures or pull out the plug.
  • Slave disks: By connecting the drive as a slave to another system, it may be possible to recover the entire data.
  • Try and locate corrupted partitions with the help of the F disk command or by booting from the floppy or CD drive.
  • In the event of a server crash, it is not advisable to recover data on the same server.
  • If database files of SQL or Microsoft Exchange are corrupted, do not attempt data recovery on the corrupted files. Instead, make a copy of the database files and then carry out recovery of data.

If you have experienced data loss, don’t panic.  Chances are good that you can recover most if not all of your data with a data recovery software program.  Or, if all else fails take your system to a data recovery services specialist.

How to Protect Your Privacy When Using a Public Computer

Tuesday, September 16th, 2008

There will always come a time when you will need to use somebody else’s computer, or a shared network computer, to do your work. Whether this computer is at a friend’s house, a library, a computer lab, or an Internet Café, it is essential to keep your private information (both personal and financial) safe in order to prevent such things as identity theft. Here are a couple tips on what you might do to be cautious.

Do not allow your web browser to save your log on information. If you are checking email or logging into any other site for any reason, when you are done, you should always click “log out” in the case that when you close the browser, the website does not automatically log you out. If you are still logged in, the next person who uses your computer can easily log onto your account and access your information. Do not allow your browser to save your username and password (usually a screen will pop up to ask if you want to).

If you are logged into anything, you should not leave your public computer for any reason. Before you step away from the computer, be sure to log out of all your programs and close all the windows that you possibly can-especially any with sensitive or private information that you would not want others to see. Also, browsers such as Internet Explorer and Mozilla Firefox keep track of your browsing history and search terms, so you may want to delete these, also. To do so in Internet Explorer, go under the Tools button at the top and click on Internet Options. Once the screen pops up, you can delete temporary internet files and cookies under the General tab, your browsing history under the History tab, and the AutoComplete option (where search forms keep track of which terms you search) under the Content tab. If you are using Firefox, then simply go to the Tools and then click on Clear Private Data, and you can check off which data you would like to get rid of.

When using a public computer, you should always be on the lookout for anyone suspicious behind you who might be looking over your shoulder at the computer. Especially be watchful if you are entering in any passwords or usernames, or checking emails with potentially sensitive data or entering credit card information. This is information that you do not want others to get, because it may jeopardize your safety and identity.

If you really want to be safe on a public computer, do not type in any passwords, usernames, credit card numbers, or any other personal information at all. There is existing software that is able to record the keystrokes on a computer and then emails all that information to a certain email address, and you do not want to take the risk if it’s possible that the software is installed on your computer. At a certified Internet Café, this is unlikely, but you should always be careful.

Backing Up Data: Why it is so Important

Tuesday, September 16th, 2008

Ever since the computer was invented, more and more information has been stored on the computer and controlled by the computer instead of on paper, controlled by people. Almost everything is now automated, from traffic lights to business finances to stock trading; if, by any chance, these computers were to crash, then all the information contained on them could be lost, resulting in disastrous consequences. But fortunately, all of these files are backed up (we hope)-that is, there’s another copy of all of the programs and data in both traffic light control computers and the stock market computers, and this information is constantly backed up in case of some sort of technological failure.

Everyone’s in an uproar about protecting against viruses and spyware and adware and spam and all that these days, yet rarely does anyone ever mention backing up the data on your computer. Without data backup, we might have experienced several economic and social crises by now, but thankfully whenever the computers failed, the data could be taken from the backup file and re-inserted into the renewed computer.

Why should you back up the data on your computer? Good question. When you are playing a game, why should you save your game? When you’re writing a story or essay or article, why do you constantly save your document? Well, when you quit the game or exit out of the document, you don’t want to lose all of the hard-earned progress you’ve made, right? The same line of reasoning applies to why you should back up your computer files-just like a paper or a game, your computer has tons upon tons of your personal files and data on it. This data represents your progress on the computer, and so you don’t want to lose all this progress in case something happens. In a normal case, your computer definitely should not crash, but just as you’d save your document several times just in case, you should back up your computer files-just in case.

There are many ways to lose data-some, you may not even think about. The most commonly mentioned method of data loss is in viruses; however, you can also lose data when there’s a power failure, or a power surge that ruins your motherboard and hard drive. Your data is saved on the hard drive of your computer, and your hard drive certainly does not last forever. A hard bump, a computer malfunction-anything could erase all of the hard-earned progress you’ve made on the computer. So why not save the game?

Let’s go through what kind of data you want to back up. You know all that time you spent bookmarking your favorite websites-do you want to lose those and start the search over? What about digital pictures stored on your computer, or files and documents needed for school or work? Or maybe the music you bought the other day off iTunes? As is evident, there’s plenty of stuff you don’t want to lose, and that’s why backing up your data is so important.

Choosing the Right Programs for File Extensions

Tuesday, September 16th, 2008

So you want to choose the right program to associate with a file extension? There are various reasons that you might decide to associate a file extension with one piece of software or another. It doesn’t just have to do with whether you like one program or another better, although that is part of it. The decision to associate a file type with one particular type of program should ultimately be based on how you want to be able to open the file.

File associations in Microsoft Windows make it so that when you see the icon for a file you can open it with a certain program by double clicking on it. This makes it easy for you to locate a file in the File Manager program (or in another part of the Windows OS), double click it and immediately see what is inside it and start working with it if you want to. There are two general ways that you can open a file in Windows - one of them is by opening the program first and then accessing the file through it, and the other is by double clicking on the file to open the associated program.

If you find yourself in a situation where you have to make frequent small changes to files, you might decide that one program is better than another for that kind of light editing. In a case such as that, while your main program for handling the files when you want to do in-depth work might be accessed through its own icon, you may associate the file type with the lighter program so that you can click through them rapidly and make changes.

Altering the association of a particular file type couldn’t be easier in Microsoft Windows. The “open with” dialog which you can access by right clicking on an example of a given file type will let you associate that file type with any program that you like. Usually the “open with” dialog will have a long list of candidates that it thinks are well suited, along with a longer list of general Windows programs. You will also have the option of clicking the “browse” button and finding any executable file on your hard drive to associate with the file type.

You can change the file type association whenever you want, which makes the “open file” dialog one of the easiest and most versatile features of Microsoft Windows. Normally you will want to change your file associations when you have a new program that you want to start using more frequently. You can give it a try as your go-to program and then change the association back if it does not work out as well - it’s all up to you.

These are just a few of the things to think about having to do with file associations. By being able to open your most commonly used programs with a double click, Microsoft Windows gives you a great and convenient tool for managing your files!

How to Associate File Extensions with the Correct Program

Tuesday, September 16th, 2008

One of the most irritating problems that you can run into when you are dealing with files in Windows Explorer is when you mistakenly associate a file with the wrong program. File types are associated with programs in Windows, so that when you view the files in File Manager you can see an icon that tells you what the file is and what kind of program opens it. The thing with Windows Explorer, however, is that it gives you the ability to change names and file associations. If someone has set the association for a file incorrectly then you may need to fix it.

The first step in repairing a problem with a file extension association is to know for sure what kind of file you are dealing with. You should probably already have some idea of what the file is. If you can open the file with some kind of program and look up the internal info, the format (which may have been auto-detected) may be given. This can be a more accurate way of finding out the actual file format than relying on the user-editable data that Windows Explorer relies on.

After you figure out for sure what the correct file format is, you need to choose the program that you are going to use to open it. You may already have a program in mind, or you may want to go online and search for software that reads the format and which has a good interface and list of features. Either way, get the software that you need installed on your computer and then you are ready to go on to the next step, which is making the association between the file format and the program manually.

The way that you create an association between a file extension and a program for reading it is by using the “open with” command on the right click menu. Access this menu and you will be able to choose from a list of programs that are registered with Windows. If you installed the program that you are going to use to read the file with a typical Windows installation routine it should either be on this list or easy to find in the Program Files directory of your hard drive.

You can test out the program at first to see if it will work and then make the association permanent the next time - this is a good way to avoid mistakenly associating files with the wrong program. The first time that you use “open with” to open a file, leave the “always use” box unchecked so that it will only be a one-time thing. If the reader program works, you can use “open with” again, but this time check the box and make it so that the file extension will be associated with the reader. Take care while you are making your file associations and fix problems right away so that you do not forget about them to get the best results!

An Introduction to Computer Viruses

Tuesday, September 16th, 2008

Computer viruses are programs which are designed to infect files on your computer. How do computer viruses work and how do they infect files? Let’s take a look at some of the basic details about computer viruses and find out how we can protect our computers from viruses and have a safe time on the world wide web!

A computer virus is just a piece of computer code - the only way that it can infect your computer is if you run something which has the virus in it. Certain kinds of files that you can download and run are called executable files. This is just a fancy name for the kind of file that you double click on to start a program. A computer virus can hide inside one of these executable files and when you run the file it will be activated - some computer viruses will then stay in the memory of your computer while others will carry out some infection task and then quit.

Typically a computer virus will not have an immediately visible effect. Computer viruses which do something to change your system right away are quickly caught, and most viruses which survive on the world wide web are designed so that they spread a certain amount before they do anything which could be harmful. There are even benign computer viruses which do nothing but copy themselves and which do not do anything harmful to the computers which they infect. It’s best to avoid any and all kinds of computer viruses however, as even these small ones take up a small amount of processing power and memory and can slow your system.

Often, a computer virus will be appended to the beginning of an executable file. When the file is run, the virus will run first, do whatever it is that it is instructed to do when the program it is attached to is started, and then the ordinary program will run its course. Perhaps when you run the virus program it will copy itself to another file on your hard drive by doing a quick search for executable files and then appending a copy of itself to another program.

Viruses will not always attach themselves to the beginnings of programs - they may choose to place themselves inside or at the end of programs. A reference or jump will then be added to the beginning of the program so that the virus will still be accessed first when the program is started. This is just one kind of trick that virus writers developed years ago to try and make it harder for anti-virus programs to detect their work.

There are lots of other tricks that viruses use to infect files, such as self-encryption to keep them from being identified. Viruses have even been developed which can infect certain kinds of scripting and not just executable files. By keeping an anti-virus program up to date on your computer (so that it can identify all of the newest tricks) and using it regularly you can catch most viruses and keep your computer safe!

A Look at How Viruses Infect Files

Tuesday, September 16th, 2008

How do computer viruses infect files - it is a question which has many possible answers, as there are thousands and thousands of computer viruses in existence and they all have somewhat different infection techniques. In the past the ways in which computer viruses would infect files was simpler - when computer viruses were first invented most of the basic computer viruses would attach themselves to the beginning of an executable file and be run first whenever the program would start. Each time that the program would run the computer viruses would search for more programs to infect and attach themselves to the beginnings of those, and so on.

More advanced types of computer viruses started to emerge as the years went by. The computer viruses which would simply attach themselves to the beginnings of programs without any other methods to protect themselves were quickly identified and defeated, so computer viruses were designed which wrote themselves to other parts of the file. The new computer viruses would put themselves at the end or somewhere in the middle of a program file. Some anti-virus programs could still detect them, though, because of the appearance of their code.

This led to computer viruses which used encryption on themselves so that they would not be seen by anti-virus software. The encryption would be a little different each time and this would make it harder for an anti-virus program to identify the unique signature of a virus. Anti-virus programs still had ways of finding the computer viruses, however - they could look at the way that a program flowed and determine whether there was a part which was suspicious. They could also compare versions of a program and recognize when a change had been made.

Some kinds of computer viruses have been created which change not only their encryption and appearance but their behavior as well. These kinds of morphing computer viruses can be more difficult to track and more difficult to come up with anti-virus software to defend against. However, new and modern anti-virus software is designed not only with virus signatures included but with heuristic (rule-based) software as well. This software is good at identifying what a program does no matter how it looks, and it is a good way to get the harder types of computer viruses which elude capture.

The most common kind of file for a computer virus to infect is a program file, also known as an executable file. Sometimes computer viruses will not occupy the program file themselves, but will occupy some kind of fake DLL file which will be called by various programs. There are also new computer viruses created today which can reside in data files when those data files are capable of being filled with scripting commands for the programs which read them.

One way to keep ahead of the developments in computer viruses is to have an anti-virus program which is kept current. Another way is to be generally careful about your computer and not run programs unless you know they are from a reputable source. Good luck staying safe from computer viruses on the world wide web!