First off you need a Welcome to the se7enforums here! And let's see if we can't you going with the tuner card there.
First of all it seems that model is Vista compatible showing the software as well as
drivers should work well on 7. That model can be seen at
Compro Technology Global_Home
Lately when trying out the various builds for seeing if the tuner card here would be able to record as well as see picture as well as hearing sound the 64bit 7 actually seemed to respond easier when detecting and installing the software and
drivers. Sometimes it will take a few attempts and even using the right click compatibility mode tab for XP SP2 with the card here or for Vista.
On the last attempt before repartitioning and reformatting two separate drives to which 7 would be the default OS(32bit or 64bit) the tuner card ran right into another typical problem of seeing over 10,000 duplicate files created wihen recording for only a minute!
The 64bit 7 on the other hand recorded as soon as the software/
drivers were on and the system restarted. I no longer had to boot into XP now removed for the moment in order to record not just simply watch only. Here the initial lack of picture saw a grey screen with sound until a few reinstall attempts saw results on a few of the previous builds.
The one thing that make and model card offers is both 32bit and 64bit software updates for Vista at
Compro Technology Global_Home
If you don't have the latest but are using the software cd only try the updates and right click on the main executable file or desktop shortcut if not already on the taskbar to use the troubleshoot compatibility option if the compatibility mode set to Vista and run as administrator fails to see results. Sometimes it still takes a few installations however to get the card itself detected fully and the drivers made active by Windows.