If you are hesitant to make changes to the registry, you could try opening a command window, then open taskmanager and 'end process' on...
Give this a try... Open notepad, and copy/paste the text below. Save the file as whatever.reg Double clicking the whatever.reg file will add...
If a process writes to the drive while it's being defragged, defrag will start all over. It could be an application logging, windows event log,...
Welcome Glad it helped.
Open a command window (Start>Run> cmd) Type: set Hit enter What is listed under USERPROFILE?
Have a look Here
Separate names with a comma.