Even bigger problem now !!!!!
Thanks everybody for the constructive help. Further looking into the problem I have un-earthed a much bigger problem. In the end I decided that I should format the Hard drive and it is now working perfectly! BUT other starange things started to happen. D drive started to play up - mouse pointer strated going for walkies across the screen.
I decided to look at the most recent programs that I have put on the computer Namely FS X and tried to remove it using the uninstall method provided. Surprise Surprise, it wouldn't let me and and told me that if I continued to try it would format my C drive ie, "Do you want to format Drive C now" To me - that smacks of virus? I have managed to individually get rid of FS X down to a handful of files but they ae not going anywhere. My machine is protected by McAfee full suite and even the shredder in there won't do it.
Any help greatly appreciated - please