eyz i found out how to make it work, and im using windows 7 home premium 64-bit..
Heres how to get it to work perfectly for Win 7 64 bit, download this driver:
After that, extract that file. You will get a "Windows7_Build7232" folder.
Now go right click "My Computer" and select "Properties".
Select "Device Manager" and under "Sound, Video and game controllers" right click "Winfast DTV 2000H" and then select "Properties"
Go to "Driver" tab and then select "Update Driver" and then "Browse my computer for driver software"
Select "Let me pick from a list of device drivers on my computer" and then select "Have disk"
Browse for the "Windows7_Build7232" folder, and then select the file in that folder (sorry i cant remember which file to select out of the 2 files).
(!!!NOTE!!! should probably restart the PC before you try the tv tuner out)
this worked for me
and i think you have to install winfast pvr2 in the x86 folder.. i hope this helps