|A laptop has been brought in to me that cannot access anything on external drives: memorysticks or external hard drives, and the CD/DVD drive, but only in normal mode. They seem to work in safe mode.|
The drives/memsticks work ok on other computers. In My Computer any external drive shows a red No Entry symbol over it, with "[driveletter]:\ is not accessible. access is denied".
I found somewhere on the internet about deleting the UpperFilters entry from the registry, and restarted the computer. I could access the memorystick once, then it went back to how it had been previously.
I can't find any software installed that might be blocking anything, and I can't find anything in the bios that might be blocking external storage devices.
The antivirus software is AVG Free.
Any help anyone can give would be greatly appreciated, I'm a bit stumped on this one.