Hi,
With regards to your PM, I'm not skilled in the area of graphics and hardware. However from reading the thread, I would believe that Howard has did what he could to help you. The problem here is just not as simple as it seems, so you would need to have it checked at a PC repair shop as Howard suggested.
If you can't scroll with your mouse, try using your keyboard.
As to your thumb drive, part of the problem could be simply the fact that it needs its drivers installed. Certain (very few I would believe) such hardware require manual installation as Windows does not have the right drivers for it to 'plug and play'.
Regards,
Your friendly momok =)