I have a client who started reporting this very issue a couple of weeks ago. I haven't experienced it myself and am only going off of what he has described to me. It has happened about 6 times over the last couple of weeks. The computer is running Windows 8 Pro 64 bit. I am investigating the problem now, and it appears that the first time it happened it was the day after he installed Google Chrome. It also looks like Adobe Flash Player 11 Plugin was installed the next day (the day that he started reporting the issue). I have just uninstalled both to see if that resovles it.
A little more background, the user has had the computer for months with no problems, this just started happening. I checked Windows update and there has not been any updates installed for a couple of months, well before this problem started.
I will post in the next couple of days with status.