The only thing I have not seen in this thread is to check you BIOS for an update. You might need to flash the BIOS since this happened during or after upgrading from Vista to 7, the motherboard might have an update. You can use this program:
CPUID
Run CPU-Z to see what your motherboard is. Post here what the motherboard is. Also you can google the Mobo name and the Words BIOS to find the latest BIOS updates usually. If none can be found, and if it is from an OEM like HP or Dell etc, call the manufacturer as they probably have seen this issue already (a lot probably).
Edits:
Caution: Flashing the BIOS is a technical process and if you do this process, please post back here for instructions or walkthrough with doing so. Each type of BIOS has its own process for flashing it.
Downloads - Support - Fujitsu
This is where you should go for drivers. I don't know if they have one for the USB, but they should. an Update for the BIOS might also be in here.Just click on drivers and then select your model.
I would like you to fill in your computer specs so we all know what your system is.