For some odd reason my TM stopped displaying the user names (in the Processes tab) all of a sudden. I tried rebooting but that didn't help. Any ideas?

Thanks.

In task manager - click View > Select Columns > Make sure the User Name box is ticked.

Sorry, I should have explained it better. The user name column shows up but all of them are blank except for "System Idle Process" (user name is System).

See the following link for fix:

Task Manager User Name column is empty

Thank you, DIIRE! It works perfectly now