Windows – MMC cannot open the file *.msc

I've had success with Sysinternals Process Explorer. With this, you can search to find what process(es) have a file open, and you can use it to close the handle(s) if you want. Of course, it is safer to close the whole process. Exercise caution and judgement.

To find a specific file, use the menu option Find->Find Handle or DLL... Type in part of the path to the file. The list of processes will appear below.

If you prefer command line, Sysinternals suite includes command line tool Handle, that lists open handles.

Examples

• c:\Program Files\SysinternalsSuite>handle.exe |findstr /i "e:\" (finds all files opened from drive e:\"
• c:\Program Files\SysinternalsSuite>handle.exe |findstr /i "file-or-path-in-question"

I agree with KCotreau but I can't comment yet with being a noob so had to write it here instead. The shared folders MMC is the old one that was in 2003 an should allow you to lanuch it after you have created it first. when creating it you will be prompted for admin rights but go through the settings and turn off the need for admin rights and allow users to select the servers. this should work. If it doesnt let us know and I know of an alternative but it requires a bit more work.