I finally removed my hdd out my acer notebook and put it into an external enclosure and connected it to my desktop pc. It found C: on that drive which it replaced with an F:, but D: on that drive was no where to be found until I went into Computer management and manually typed in D: for that partition. I then saw and red all my files on that. The real problem wasn't until I switched on my pc the next day and this D: was gone again. I then went back into computer management and tried to type in D: for that partition but this time it came up with an error saying "can not apply drive letter until you enable volume read, reboot to enable volume read", well I rebooted the computer ,but no D: was anywhere to be seen. Please help, what do I need to do to get this back ?