A while ago my computer froze up and I couldnt do anything, so I had to restart it. When it came back up my D drive wasn't accesible. If i try to open it it says I need to format it to use it. If I click cancel it says D:\ is not accessible. The volume does not contain a recognized file system. Please make sure that all required file system drivers are loaded and that the volume is not corrupted. If i click format it says Windows was unable to complete the format.