So far today, Norton 360 has run a background scan on my computer 3 times today. I walk away from my computer for 15 minutes and come back to try to use it and Norton is running a scan. And, my computer does not respond when the scan is running, so I have to wait each time untill the scan is completed. Is there anyway to get this to stop happening? I don't mind if it scans, but can't it do its stuff in the middle of the night or something....and why so many times during a day anyway.