Download and install CCleªner said:
UNCHECK Yahoos toolbar during install.
UNCHECK Windows Defender in the applications.
Tip: Mr.G recommend using the default checked boxes and running Advanced
maybe once a month or so,
It is fine to have things ticked in SYSTEM, but it would not be advisable to
tick anything in Advanced unless you are sure what you are doing.
CCleaner Beginner's Guide
<
http://www.internetrotsyourbrain.com/ccleanerbeginnersguide/>
Go for scans in safe mode
The first time you run CCleaner's Issues scanner you'll have to keep running
it back-to-back until it finds nothing.
One scenario is a registry key may only be a reference pointing to a
completely different location in the registry and when it's removed then that
reference link is also noticed as being invalid on a subsequent scan.
It's generally a good idea to keep running the Issues scan until nothing is
listed.
Reboot
Good luck
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FATE
There is no such thing as accident; it is fate misnamed.— Napoleon