You may have installed the Service Pack 1 for Windows 7, this release is known to have plenty of bugs and errors after downloading. Myself, have downloaded it and all input and output eg Printer, Camera and Sound all completly stopped working.
How to solve this problem:
There are two ways, on Windows 7 to solve this, go to the start menu >> and type in "System Restore" and click the program and choose a date to restore it (before the update)
If you believe it is just one update that is casuing the problem, go to Control Panel >> Programes and Features >> and on the left navigation panel choose "View Installed Updates". From there, you can choose the update and uninstall it just like a program
Administrator of Techno Buffalo, and helped invent Google at the age of 4.
· 8 years ago