Can’t start PC dead in the water

EXPLORER caused an invalid page fault in module explorer.exe. at 017f:00401f31.
Rebooted, loged in and get aboue error, system just sits with hour glass. I have a startup disk but can’t get to see the C drive. Ran A:ext and it saw the E drive, notsure what files to copy off the e:\Win98 disk to the c: drive. Help I don’t have a clean backup 4+gb on drive.