I have the HP Pavilion h8-1090t desktop with the i7 990x and Windows 7 Ultimate.
The TV tuner is a WinTV-HVR-1260 and worked fine until I had to use Charter's set top box,Motorola DCX3220e.
The problem is I can't change the channels in the box with Windows Media Center and I think it has something to
do with the IR cable. Media Center finds the channels, can learn remote buttons,but in the end the last numbers
entered does not change the channels in the box.