I suspected virus or malware and have tried spy sweeper, adaware, spybot and trend micro housecall. They have all found stuff and removed at some time in the last week or so. This problem started about 3 weeks ago.
The problem is that the machine is running very slowly like the processor is tied up with something else.
For example, I try to open internet explorer or firefox. I takes about 20 seconds compared with about 3 previously. I have defragged the disk and that helped a little but still looking at an hourglass way more than I should be.
Thank you for your help. It is driving me crazy!!