try running the installer as enforced admin (right click, run as admin). you can tell it to continue even if the driver isnt signed and should be fine.
something else to note is that there are multiple versions of your card. the V3 and V1 drivers are different, which is probably why the software can't pick up on the card.
Okay, well i did install the drivers completely, and selected install anyway, but under Device Manager, it says it's not working due to the drivers not being signed. The V3 drivers dont pick the card up. On the top of my card it show 'REV:1.1' so perhaps this means it's a V1 Card?