Hi all, I upgraded from Vista to Windows 7 yesterday and It all went smoothly. But, now I have a strange problem. I'll try my best to explain it. 1st. Before upgrading I moved & copied many files from the computer to my USB External HDD. Alot of these files were on the Vista Desktop. 2nd. Once I had upgraded to Windows 7 and it started up without the external HDD plugged in, I get an error message displayed alerting me that the files cannot be found/located. The desktop shows none of the files that I Copied (not moved, just copied). 3rd. Once I plug in the external HDD all the files show up on the desktop all of a sudden and I stop receiving the error messages. But it is not practical to have the external HDD always plugged in as I'm using a laptop, and I dont see why i would get this error anyway. 4th. Windows Messenger live will not sign in and displays error 8000ffff when the external HDD is installed. BUT, as soon as I plug in the external HDD Messenger signs in fine without the 8000ffff error. VERY ANNOYING!! I dont want to have to do a clean install if I can help it, but how else can I sort this problem? All help is appreciated.