I have a Geforce4 Ti 4600 and a 4200. After the driver is installed (45.23)
both of them cause Windows 98 to freeze during or right after bootup. Most of the time it shows a black screen with nothing but the hourglass mouse symbol. Sometimes it goes into windows and locks up after a few seconds. On rare occasion, reinstalling the driver fixes the problem until the next few boot ups. Reinstalling Windows altogether results in the cards working as they should... well mostly. If I let my PC sit for a few hours it goes back to it's faulty behavior...

Obviously I really don't want to fiddle with drivers and Windows reinstalls everytime I want to play some games.
When the cards decide to work, they work perfectly fine. I can do gaming, running through benchmarks all day without any issues. But to get to that point, I have to persuade the damn thing for like 30 minutes to do anything. It's driving me crazy!

here is what I tried so far (without consistent results):
- using different driver versions
- removing all PCI and ISA cards
- visually checking for faulty components or bad solder joints
- changing graphics aperture size to 128MB in the BIOS