I am using an HP laptop with Windows 7 Ultimate. I have Microsoft Security Essentials and AVG 2013 antivirus. I recently noticed my computer has been a little slow and behaving strange, it was using more memory and bandwidth than usual.
Then I ran an online scan and it caught two trojans. So it led me to think that is it really useful to run two antivirus programs at the same time. Beside the cost in system performance, does it hamper in one another’s task of detecting viruses?