My computer with Windows 7 RTM x64 won't boot properly when I have my Hauppauge 1800 TV tuner card installed (it freezes at the Windows logo after 30 seconds). The card is installed in the same PCI-X slot it was in when it worked properly with Vista x64. Windows 7 boots completely when I remove the card. I have a MSI 790FX-GD70 motherboard with the latest 1.4 bios. The same issue occurred when I had the version 1.3 bios.
When I boot into safe mode, the card is recognized properly and a driver
is even installed. The device manager said there are no conflicts with the card.
Resetting all of my bios settings to the defaults allows Windows 7 to boot up completely. I've tried using the drivers
Windows 7 installs itself and Hauppauge's 1.1E drivers. Windows 7 either freezes when it tries to install the drivers itself or Windows Media Center freezes the whole system when it tries to access the card.
The user in this thread seemed to be having the same problem that I am having, but I haven't fixed it yet: Tv Tuner