Hi Bob. This is not an unusual problem, for example see this site which also has some suggested solutions (especially read the solution from Jesse) click here. It looks like the problem may not be that the files are missing, but that they are incorrectly called from another file - possibly Config.sys or (more likely) msdos.sys. Try searching your C: drive for these files. They should be in C:\WINDOWS. If they are missing, you can extract them from your Windows98 disk, or e-mail me via the envelope alongside my nickname and I'll send you the files. You should also do a scan for viruses. The site referenced above suggests that a virus is the cause.