system file checker checks the file system,i.e. makes sure all the files of the operating system are correct. Check from the Drive\Properties\Tools tab....checks the disk for errors...or so I believe.AB68
Thanks oldbeefer2. I have experienced the "flash" you describe. I run scannow from the run box by placing my original I386 folder (from my installation disc) and giving it a path in the registry. Just a bit more convenient than using the cmd prompt. Thanks everyone for taking an interest.