I've started this thread as a solution for a problem that I encountered when I told my computer to sleep. I have to hard drives both made by Western Digital. I don't know if that is what caused the error (I have no idea why this happened FYI), but it is the cause of why I didn't recognize the problem sooner. What happened is that when I told my computer to sleep it changed the boot order of my hard drives, so that when I went to check the boot priority of the hard drives, I just saw the hard drive designator and figured it was the correct one. If this problem happens to you, make sure that in the hard disk drives menu of the boot tab of your bios, the disk that has windows on it is the first disk that gets booted. This problem was causing my computer to look in the wrong hard disk for my OS. Here is the original thread that I started when looking for the answer: http://social.technet.microsoft.com/Forums/en-US/w7itprogeneral/thread/4a6fd961-7aad-40f7-b43c-cd8b7173b147