Navigate to c:\ and right click on Users. Select properties. Under the General tab, look at the bottom for the Hidden selection. If there is not a check mark in the box, place a check mark there. Hit apply, select yes to apply to all subdirectories. If you clicked ok, you may notice that it disappeared from the right pane once it finishes. It should still be listed under the tree on the left. Right click on it again. This time remove the check mark and apply to all subdirectories. Once it has finished, your files in the Users directory should reappear and Catalyst Control Center should function normally again. This has worked in all cases that I have encounterd so far. Hopefully this works for you as well..