face,
in addition to Boyd's information, I had this problem for the longest time with control panel shortcuts stored in my system32 folder for ease of access. I can't remember how I made them visible again, but I 'think' I pushed the "restore defaults" button in the 'folder options' dialog. You can get to the dialog via the CP screens.
Also, take a look here: http://www.pctools.com/forum/showthread.php?t=36172
The solution there I really don't understand, but what the responder is doing for the OP is taking out two attributes for the files in the c:\windows dir. You may try doing the same thing for your machine, but of course there's always a risk if you don't know what you're doing.
I tested this out on my 'windows' folder and nothing really happened, but I had the settings applied before opening DOS. I typed this in:
Code:
cd c:\windows
attrib -s -h c:\windows
If all else fails, you might try doing that for your desktop directory. With my shortcuts problem way back when, I got the same error message you are getting now when I tried to copy replacement shortcuts in. If you do try that, make sure and make a backup of your DT directory beforehand, and there really shouldn't be any risk to you.
One other thing too...isn't the default behavior for drag and drop a move command instead of a copy? It always is for me. Are you sure, if that's what you did, that you didn't actually move it accidentally? The error message about the dir would still popup, regardless of whether the mdb was inside or not.