Ever wonder why Windows scolds you whenever you restart your computer after shutting it off the wrong way? Sure, you may know that pulling your PC's plug without shutting down Windows can cause errors, but it may not have been your fault. Perhaps Windows refused to shut down, and no amount of pressing CTRL-ALT-DELETE would help. Or perhaps your haughty PC is blaming you for an electrical brownout. Whatever the reason, Windows runs the ScanDisk (Win95/98/Me) or Chkdsk (WinXP) utilities to make sure there are no resulting file errors. ScanDisk and Chkdsk can turn stray pieces of files, or lost clusters, into file fragments for your review.

If ScanDisk found file fragments, they should now appear as CHK files in your C:\ directory.
Most of these files are useless and sometimes there are hundreds or even thousands of them on your drive. Easy SystemCleaner will get rid of all of these stray file fragments.