Usb disks no longer show

[peige]

My work vista 32 pc, if i insert a usb drive of any kind it all seems ok but the drive never shows in explorer ?
If i go to manage drives the disk is there and "healthy", if i go to a command prompt and do J: it changes to the drive and does a directory fine.

If I double click "my computer" its not there... any ideas ?

 

[peige]

Yes, its fine in disk management, pressing f5 in explorer refreshes the window but the drive still isn't there. Disk management shows it as drive L and i can get to it using the command prompt :s

/edit

Buttt.. there was a network mapped drive that was broken on letter L, just deleted that and we're cooking again, how wierd