deleting ccleaner via control panel did not work, nor did another restart.
cracked in the end by taking all the ticks out at the start of the install [eg recycle bin, check for updates, shortcuts, etc
then went to windows explorer and created my own short cut for the desktop. not sure if its the new version or not but running a clean is very quick now before it was always sluggish clearing chrome related stuff.
be interested to see if any others get this [using windows 8.1]