Sometimes, when i tab back into Skyrim after eg using Chrome, I can't press anything and there is a "dududududu" sound playing (from Windows i think). My PC/Skyrim doesnt actually crash, i just can't use my keyboard/mouse at all (except i can move my characters head around very slowly with lots of lag.). I have to manually restart my PC to fix this, which is very annoying. Has anybody experienced this/got a solution? I'm running Windows 7.

Don't alt-tab in and out of Skyrim. It really, really doesn't like it. Few of Bethesda's games do, heck a lot of games don't.

Some you can alt-tab in and out and it's fine, other's you really shouldn't.

If you need to go on the interent, exit the game first.