Thanks Xircal.
I ran the 'Fix-It Tool' but Piriform Defraggler (or just Defraggler) was not displayed in the list so I chose 'Not listed' and clicked 'Next' and it asked me for a Product Code (which I would not know) and would not allow me to continue without it.
Why do the developers make it so difficult to remove their software?
Can I remove the Fix-It icon from the desktop-Would it have placed itself anywhere else that needs to be deleted?
Run the Fixit manually Shopper, not automatically. You can still choose "Not listed", but it should give you more options.
The Fixit doesn''t run on Windows 8.1 so I can't run it myself to see what you're seeing unfortunately, and I don't have a Windows XP machine anymore.