New
#21
Let's bump this post to so this will be visible again. Sorry mate but I've run out of ideas as of the moment. Every possible solution was most probably given so the only solution I could think of is to reinstall your drivers. Try the latest ones or if the problem started after or a few days after you installed the latest drivers, try to install the one before it. I suggest you try Driver Sweeper so no remnants of the latest driver will be removed.
Other than that, a reinstall or restore from an image is another solution but that would be too drastic (reinstall that is) and should only be done after you've exhausted all possible solutions.