Thanks for answering, however, I have on several occasions done as you suggested, having seen "other people's issue problems" and answers, I did all my checks in "Safe Mode" in the hope that this would help. I ran "Antivirus, Spyware, Adware" etc in the hope that something would pick up and correct the problems.
However, I was wrong. The only other way that appears open to me, is to take it to a "Computer Repairer" and have it cleaned by him.
Thanks anyway
JacquiM