Upon clicking on the SQL Server Enterprise Manager shortcut the following error occurs:
MMC cannot open the file C:\Program Files\Microsoft SQL Server\80\Tools\BINN\SQL Server Enterprise Manager.MSC.
This may be because the file does not exist, is not an MMC console, or was created by a later version of MMC. This may also be because you do not have sufficient access rights to the file.
The msc file did exist and I definately has permissions to it. So I can only assume it some how got corrupt.
The solution to this is fairly simple... either get another copy of this file, or create one, as follows:
1.Select Start - Run.
2.At the Open prompt enter: mmc
3.Click OK
4.Select File - Add/Remove Snap-in...
5.Click Add...
6.Select Microsoft SQL Enterprise Manager
7.Click Add, then Close
8.Click Ok to return to the mmc.
9.Select File - Save As...
10.Delete or rename the original (offending) file out the way.
11.Save the new msc file as C:\Program Files\Microsoft SQL Server\80\Tools\BINN\SQL Server Enterprise Manager.MSC
Now your original shortcut should work.
Alternatively you can always access Enterprise Manager from within the Computer Management mmc.
HTH
Tim
http://geekswithblogs.net/TimH/archive/2005/08/09/49716.aspx