I have an old pc running Win 7. I stuck an old Asus 512MB HDMI card in it. Computer booted fine and display was okay, but I couldn't set correct resolution. So I got the model number off the card, found the correct driver on the Asus site, installed it. Everything seemed fine up to this point. I would like to emphasise that I carefully checked the numbers. I have the correct model number (unless it was printed wrong) and I downloaded the correct driver for that card from Asus.
The installation completed with no problem or error so I rebooted as instructed. And now the system is hosed. With great difficulty and much keyboard hammering, I managed to boot into safe mode a couple times. I uninstalled the driver but that hasn't fixed the problem. It is now almost impossible to start the computer. It just disappears into a black hole somewhere. Thanks a lot, Asus.