Tv Tuner for Inspiron Zino HD

Hello-

I recently purchased an Inspiron Zino HD.  I am very happy with the computer except one issue.  I appraently cannot successfully use it with a tv tuner.  ANY help on this would be great!

I purchased a Hauppauge Win TV-HVR 950Q hybrid tv stick (that's what they had at Best Buy off the shelf).  Of course once plugged in and configured, video is jumpy and skips.  I have troubleshooted using the Hauppauge suggestions including making sure the graphics card driver is up to date with no better results.  I am under the recommended processor speed of 2.2 ghz (950Q tech specs) and subsequently have discovered I am under for all the tuners I have looked up the tech specs on.  I am wondering if there is a way to tweak the processor to get this work or if I should return the Zino (I got it last week) and get something different or is there a tuner out there that I can get to work with this computer?  This computer's function is pretty much only going to be my TV-DVD-Internet source, so I need to find a solution to the tv part.  The computer is hooked into a projector.  I will be using MCE to view media.  I have standard cable tv (no box) running to the tuner.  If there is another tuner out there, I would prefer it to be a dual tuner.

Computer specs:

Inspiron 410 operating W7

Processor: AMD Phenom II P9640 Quad Core 1.7 GHz

System Memery: 8 GB

System Type: 64 bit Operating System

Display: ATI Mobility Radeon HD 5450

My five year old computer (XPS/Dimension 200/5150C) which recently died did all of this without any problems (internal PCI card) so I don't understand why it is an issue at this point with an external stick.  If you can enlighten me on this I would appreciate that as well.

Thank you