I am trying to do a clean install of win 7 and have wiped the drive and installed system files for win98 when I go into setup in dos it says scanning the registry and reboots immediately instead of doing the scan. Please help I have a pentium 4 an old one an no operating system as of yet, I tried to boot from cd by changing the bios booting sequence but no luck there either just says "missing operating system" Thanks.