Notice on 'cookies'.
Cookies may also be placed on your computer by your internet supplier, or search engine or bank or shopping site or any ordinary website – this is how they manage your 'basket of goods' or ‘profile’ over such cookies we have no control.
and / or
“CCleaner” (http://www.piriform.com )
This program allows you to delete and manage cookies easily, as well as other clean up of hard disc and 'registry' on Windows computers