Disk De-Fragment-er can be used to check sector errors in your drives. There are tools available who can easily tell you about the problems and you can start with some bench-marking software to know the problem. Then try to rectify it by doing some more scans or taking it to the repair shop.
Chkdsk utility
check disk, or chkdsk in the Run menu
On a Widows operating system, 1). Go to "My Computer". 2). Right click on the drive you wish to check for errors. 3). Select the "Tools" tab. 4). Select the "Error-checking" tab and click, "Check Now" 5). Check "Automatically fix file system errors" AND check "Scan for and attempt recovery of bad sectors" 6). Click "Start" Note: If the hard drive you are checking for errors is the drive where your operating system is installed, you will be prompted that the the drive cannot be checked at this time but you will be given the option to schedule the drive (disc) check the next time you reboot your computer. In this case choose, "schedule a dskchck". 6). Shut down the computer. 7). Reboot the computer; the hard drive is then, automatically checked for errors. Once the check is run and compelted, you computer will continue the re-boot process and your system is up, loaded and ready again to use.
That would depend on what operating system you are using. Every operating system has its own tools for checking hard drive and file system consistency.
I think answer is File Compression
Microsoft fax utility can convert fax file to a word file. Here check this software found in here: http://fax-software.ringcentral.com/
if you are refering to word then you can use abc spelling check.
There are many things that can cause file system errors. Often it is just a glitch, the PC hanging at the wrong time, or an abrupt shutdown. Other times, this can be an early sign of a failing hard drive. You should start by using a disk repair tool such as CHKDSK or Scandisk. You can go to My Computer, right click the C Drive, and go to Properties, then to Tools. There is an option to check the system drive there that you can use. If you have other symptoms like the system sometimes starting to a blue screen or hanging, or the system taking a long time, then you should get the hard drive manufacturer's test utility. It might be able to relocate any endangered data and/or tell you if a crash is imminent. If there are a lot of errors, then you should get a new hard drive, reinstall everything onto it, then copy any and all user data you can from the failing drive.
Depending on the Unix vendor, there is usually a 'spell' or 'ispell' command available to spell check words in a file.
WinZip
File compression
WinZip