Can't Log Out of Windows Server 2008

I'm currently logged into my Windows Server 2008 R2 (x64) server, using Remote Desktop. As soon as I clicked on Start -> Log Out, this message popped up:

The message says: "Waiting for all snap-ins to complete..."

There's a second dialog box in the background that says:

MMC cannot initialize the snap-in.

Now I can't log out and I can't bring up task manager. I can hit ctrl-alt-del and then click Task Manager, I can right-click the task bar and click Start Task Manager, and I can click the start menu and click Log Out, but none of those do anything. I also can't click the OK button that is shown in the screenshot.

This is a live web server, so I don't want to try restarting the server.

I can just disconnect from Remote Desktop, but these dialog boxes are still shown when I log back in later.

Any ideas? Do I just need to wait until the middle of the night and restart the server?

When I originally posted this question, I had completely forgotten that I have PCMonitor installed on the server and one of the options it gives me is to use my phone to see logged in users and to log them out.

As soon as I sent the command to log out my user, my Remote Desktop session ended, and then when I logged back in the MMC dialog boxes were finally gone.

Sorry it's not a better answer for anyone that doesn't have an app like that installed.