Originally Posted by
chris8vb
I had a similar problem with my pinnacle 2000i tv card on win 7 x64. It would be fine after reinstall, find the channels and work absolutely fine, then after reboot it couldn't find half of the channels and others would be unwatchable, reinstalling the drivers would fix the problem until reboot. I tried everything I could think of including buying a signal booster from Argos.
After practically pulling my hair out for the enitre weekend, last roll of the dice before going 32-bit was to try an older vista driver, it now works perfect.
Not sure that will help you being a different card but worth a shot if you can get hold of an older driver.