I suggest you run the Microsoft Genuine Advantage Diagnostics Tool in normal mode and copy and paste the results in a reply for further analysis:
http://go.microsoft.com/fwlink/?linkid=52012
Run the Tool and when it completes click the Copy button, open a text file like Word or Notepad and select Edit, Paste. You can paste directly into a reply here. Open a reply, right click and select Paste.
Why haven't you installed the Windows 7 SP1 update?
Please download and run Driver View and upload a copy of the report it produces to your Sky Drive. To get a report on all drivers select Edit, Select All followed by File, Save Selected Items.