Running 2 AV’s on 1 pc is a bad idea.

Why ?

Because it’s extemely hard to “unload & disable” the complete resident processes from a scanner. They always seem to load something. And could give problems on low-level system.

Use a online scanner as backup from time to time. They work just as good as the “full” version. And don’t need to install much, only some virus definitions and some active-x
files.

http://housecall.trendmicro.com/

The only backup scanner that is known to be without problems is the freeware scanner from Bitdefender v7. Wich doesn’t include resident scanning at all. It offers a good detection rate.

Kind regards,

Waldo