Dear TechSpot, I just bought a new "used"/"refurbished" computer about two months ago and it already seems slower than when new. I run the premium version of Norton 360, and the premium version of SuperAntiSpyware Professional. So I have some good protection there. However, I wonder if these programs are the cause of my PC sluggishness or do I have a virus they don't identify on my system? 60 days ago the computer would complete a scan in just over 5 minutes, now scans take between 25-40 minutes to complete. - And twice as long if run in Safe Mode - I receive between 2 and 6 calls to my home phone always from different fax machines which beep & screech in my ear and twice as many porn and viagra/cialis emails which simply annoy. I'd hate to have my new computer infected already. So, please help, I am interested in your thoughts. Thanks.