Yes you can run the two together but defender isnt very good so MBAM Pro is what most people here run with avast but by all means if you dont wish to pay for the pro use defender in realtime and install MBAM free to run a weekly scan with.
My advice would be to uninstall Defender and install MBAM. It’s much better! I found regardless of what threats you have on your pc Defender will always just give a clean scan result. Waste of time.
Since Avast’s improvements to the Behavior Shield I’ve found Defender to be less critical, but I still use it as part of a layered defense. It hasn’t interfered with Avast on Vista, and it’s pretty good at spotting those pesky programs that want to secretly add stuff to startup.
I’ve installed Windows Defender alongside of Avast 4.8 via Group Policy at one of my smaller client locations.
My observations are as follows:
It slows older (especially Win XP) machines down a bit, by using precious resources such as RAM and CPU cycles. It hasn’t found anything bad except for VNC and other remote access technologies.
So for now, it seems pretty useless to use them side by side in Windows XP environments, but Win Vista/7 machines might see some obvious gain from using them both. I only say that because any machine that can run Vista or 7 usually has enough horsepower to not be effected by the extra memory or CPU cycles that WD tends to steal away from it.
If you have older machines, I’d say to just leave Avast alone and keep WD away from it.
I’m thinking about removing WD from Group policy shortly.
Edit: Oh, and I currently believe that so far, WD hasn’t found anything worth removing, so Avast is more than enough protection. Why waste CPU and memory when something else can find the same thing?
Kenny, I already told you some time ago, that I have a couple of systems.
It’s not my fault, that you can’t remember.
So, if your question is, if WD should be used on Vista/W7 - my answer is the same: NO
asyn