When your inside explorer and you click rename and it tries to search your whole hard drive for where its used. There should be an option to search whole hard-drive or just the folder your in. If you have many files it searches forever and it hangs when you press cancel.

I click 'Name' in the folder directory to re-order my files for easy viewing, my drawing ABC001 Shaft is under my part ABC001 Shaft, now after you've renamed your file the rename popup closes and then re-organizes your folders all over the place.