So I have two Hard Drives. One for Windows and program files. The second one is bigger and has all my data, picture, movie, etc files. Tonight I was using Movie Maker to save a movie I had just put together to Drive F. It was about half way done when a deep blue screen came up and said that Windows had detected something that was a possible harm to Windows and so it had shut down and I should restart the system if this was the first time this screen had appeared. I pressed the restart button and while it was doing it's start up it stopped at Drive C the Master Drive, the jumped past Drive F the Slave Drive and found the floppy drive, the cd drive, the DVD Burner Drive and the Scanner. When Windows came back up with no problems I clicked on My Computer and everything came up except drive F. It's like it's not there anymore. This is the same thing that happened last year that eventually led to a complete computer failure as Windows plus the Program files were all on one drive. Now I can still access the internet and get my email, but I just don't have my drive with all my data and pictures on it. I get so frustrated with all these problems, and I don't know what or how to fix it if it can be repaired. A friend of mine used Windows to repair a crashed drive one before and it worked, but I don't know how he did it. I had two drives then as well, and again the data drive was the one that crashed.