Thank you so much Starbuck and Buddy for your help. I have now installed and run a scan from Super Antispyware. It just found 16 harmless cookies that I have deleted just to be on the safe side. So hopefully no harm done from that nasty Js/psyme thingy!
I am sorry that it took me so long to reply but working full time does not give me a lot of time or enthusiasm during the week to sort out my PC problems. The past couple of weekends the weather has been far too good and living near the beach it is too much to resist getting out and about.
Anyway as at today I have another 69 and one half working days left before I retire, so come the winter hopefully I shall be glued to the PC.
Thanks again eveyone. This is a really useful forum.