Radio--many thanks! I did as you suggested and the computer seems to run faster. I also notice I freed up 1.3Gb of space on my hard drive!
One question: any chance Spyware blaster would interfere with my Virus scan? I use Freedom, supplied by my server (Bell Canada's sympatico.ca). It comes with Ad manager and pop-up blocker, though I realize they don't prevent spyware, only deal with the symptoms.
Again thank you!