I have been testing AS programs for quite sometime . Only on demand . NOT the realtime as I do not use these . I must say that Spyware Doctor really is good . I was a little surprised . There are very good antimalware apps but , for on demand to see if anything is on your system , SD really rocks . Testing proved it found more than M$AS , Pest Patrol , SpySweeper , and McAfee . SD seemed to run light for me . Not to say how it will run on your system as all are different . Just a suggestion to give it a try . I wish I could find the free version that only detects and removes in on demand as I never use realtime . But , it is money well spent . If anyone else needs an app for spyware , the above mentioned are all good in my eyes . Spy Doctor proved the best .