Hello Schwaste. Welcome to the forum.
If you want someone to look at your dump files you should start a new thread in the Crashes and Debugging Forum here. Include your zip file.
But it sounds like a bad driver install. Here is what you can do:
Go to the Hauppauge website and download the most recent driver for your version of Windows 7 (32 bit or 64 bit). Always a good idea to use the driver from the site, the driver on the CD is notoriously old.
Then go into Device Manager and Uninstall the Hauppauge tuner. Once uninstalled shut down the computer, disconnect the power.
Then physically remove the card from the machine and start up again.
Go to System Restore and restore the computer back to a date before you installed the card.
Now shut down and reinstall the card again, get into Windows, and install the new driver. When you first reach the desktop Windows will try and fail to find and install a driver for the new device. Let this process play out. Windows will find nothing and say so. X out of that window, then you are ready to install the Hauppauge driver.
When reinstalling the card, it might help to use a different PCI-e slot, if available.
Hope that helps.