Hmm could be that you are selecting the wrong version of the driver. They have Windows 7 32bit versions and 64bit versions, then Windows 8 32bit and 64bit versions. It is just a guess on my part. You can go to the "Control panel" and click on system and under "System Type" it will tell you if you are running 32bit or 64bit and also if it is windows 7 or windows 8. Hope this helps.