Hello! I have that strange problem, I tracked down and I found it's possible it's Raptr causing it because I only have when I play games with Raptr tracking them and it's pretty bad when I manually add a game. I start to have I/O read/write failures as soon as I close the game or as soon I manually add a game. Sky disconnects with I/O read/write failure message and I need to restart my computer to get back to normal, but all my saved passwords are gone, all forums, Skype, Facebook... I need to login again. It only happens when I play games tracked or manually add a game, if I play a game with Raptr closed, it doesn't happen.
Thanks in advance.