|UNDELETE was the msdos utility and UNERASE was norton utilities, although maybe other undelete utilities were named the same.|
They work OK on my 98 system but I need to reboot or exit to dos--not a dos window--to use them. And the OS needs to be on a fat16 and not a fat32 partition. Undeleting files on a fat32 partition must be harder and I've never found a command that works like undelete and unerase do on fat16 partitions.
Also, it's going to depend on how they were deleted. When a file is deleted in dos it just erases the first letter of the file name. UNDELETE and UNERASE locate those files and then you enter the first letter to restore the file. If files are erased in some other way then I don't think those commands can recover them.
Otherwise, just copy the dos 6.22 undelete (or NU's unerase) command to your windows\command folder.
Real men don't use AntiVirus; they just reformat