Edwin,
I can't help specifically, but there are 2 features in Windows to get back where you were.
If you can find Computer Management > Device Manager > Sound, Video and Game controllers, find your related drivers and see if there is a "rollback" option that can reset changed drivers to an earlier version.
You also have the option to do a 'System Restore', provided you've already stored some restore dates. This'll install a prior Registry. If you've installed or uninstalled anything recently and it asked you to "restart your computer" to complete, then a restore point was automatically saved.
Best, Paul
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WUDAYAKNOW.. For the first time in my life, I'm wrong again!!
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