I'm getting the same problem - was using 507 and kept getting memory messages from Windows 10
Upgraded to 508 and thought this would solve the problem
Came back to machine next morning and found I couldn't see the screen or log in. Had to completely turn off the PC and do a full re-cycle to get it to boot.
Then saw the problem with cccleaner and memory again.
Not actually used it on Windows 10 yet - just been running in the background, monitoring.
Unfortunately I have had to uninstall it for the time being until Pirform sort out the problems
