Did you run the Windows 7 Upgrade Advisor If not use the link to download it and run it on your system. When the report appears click on the tab that matches the bit rate of your Windows 7 and see if it shows any problems.
Also, take a look in the Device Manager from the Control Panel and see if there are any yellow warnings and post the full entry next to any you find.
What is the make and model number of the PC?
Also, take a look in the Device Manager from the Control Panel and see if there are any yellow warnings and post the full entry next to any you find.
What is the make and model number of the PC?