Win XP Pro system, PowerTools 2014.
Select Clean and Fix My Computer
Wait for system analysis - Done
Display of Unneeded Fragments, etc - Done
Check Boxes to indicate which fragments to remove - OK
Click on "FIX"
Popup asks if I want to compress Registry - Press Yes
Popup goes away, but nothing happens. Computer is not stuck or crashed, but FIX does not run.
After a few minutes, still nothing.
Press FIX again, popup comes back asking to compress registry
Press YES,
Popup disappears and FIX begins and completes normally.