Hi Ben,
Thank you for posting your query on Microsoft Community.
we understand your inconvenience. We will assist you to resolve this issue.
Please uninstall the TV tuner card and then install it in
compatibility mode and check.
Please follow the steps to uninstall the drivers from Device Manager:
a. Press Windows + R.
b. Type devmgmt.msc and press
Enter
c. In Device manager search for the
device, right click on it and select the option uninstall.
d. Restart the computer and check.
Once you have completed the steps, we suggest you to download and install the latest driver from the manufacturer’s website in compatibility mode and check if it helps.
After you have downloaded the driver:
a) Right-click on the setup file of the driver and select "Properties".
b) Select "Compatibility" Tab.
c) Place a check mark next to "Run this program in Compatibility mode" and
select the operating system accordingly from the drop down list.
d) Let the driver install and then check the functionality
Please follow the link below to check the compatibility of your TV tuner card
http://www.microsoft.com/en-us/windows/compatibility/CompatCenter/ProductViewerWithUpdatedFilters?TempOsid=Windows%208.1&Locale=en-us&Architecture=X64&TextSearch=tv%20tuner&Type=Both&CurrentPage=1&TotalPages=68&ShowCriteria=0&Compatibility=Unknown&ProductName=tv%20tuner
Hope it helps, reply to us with the status of your issue. We will be happy to assist you.
Thank you.