These take a serious laptop. I've tried it on two. One is a desktop replacement level from a couple years ago. I have to give it a mixed review. When it pops up & says the processor can't handle HD they are serious. After flipping through a couple HD channels, it locked up. If you have a machine that can handle it, the HD reception is AWESOME compared to the tv receivers for computers from a few years ago.

Requires:
XP w/ SP2 or Vista
Pentium 4 @ 2.4 GHz, Pentium M @ 1.3GHz, or equivalent AMD Athlon 64 processor for normal resolution.
Pentium 4 @ 2.8 GHz, Pentium M @ 1.7GHz, or equivalent AMD Athlon 64 processor for HD resolution.
XP takes 256MB ram (512 recommended)
Vista takes 512MB ram (1GB recommended)
Audio & graphics support for DirectX 9
1GB of hard drive free minimum