I recentely installed a Saphire Radeon 9500 128MB video card, and it worked fine for a few days, but then the PC crashed while i was playing a game. I restarted but the PC would crash at the as soon as the Windows 98 logo appeared on the screen during bootup. I also got the message 'Ultra100 not installed'.
I have tried booting from my Windows 98 recovery CD but the PC wouldn't even recognise that it was in the CD drive. I even changed the boot priority in the Bios so that the CD was first, but no luck. Also, the PC fails to recognise any Primary or Secondary Master on the first memory check screen at bootup.
After swapping the Radeon out and reverting to the old graphics card, I did SYS C: then managed to boot the PC in safe mode, then restart into normal mode, but with limited video card functionality. I started to backup vital files, but the system would crash frequentely, and I would have to SYS C: again before being able to boot up, and even then the system would fail to boot up on several occasions. Now however the system won't boot up at all and is back at crashing at the Windows 98 logo screen. I have no idea what is going on at all.