It might be a power supply problem, you never know. Go here: http://www.lavalys.com
Download Everst Home from the Products Section (Free)
Go to folder called sensor
Scroll to bottom and look at voltages
Then go here:
Make sure your voltages are tolerated.
Then open up your computer. Touch the brackets which hold the optical drives to get rid of static electricity.
Look at the Power supply (Thing that power cable plugs into the computer) and the sticker that is on it. Tell me what the number is for the 3.3 v, 5 v, and 12v columns or rows are. They should be something like 20a, 30a, 40a, or so on.
Then tell me the specs of your computer, all of them. You can get them from everst whatever. CPU, harddrivse, optical drivs, memory, video card, everything. Waiting for your response.