You can run anti malware/spyware programs alongside Avast! (such as MBAM or Win Defender in 7) but it is not advisable to run two antivirus program together ie AVG with Avast! or Microsoft Security Essentials with Avast!. MSE is renamed Defender in Win 8 therefore is a different program to Defender in Win 7.
Thank you.
Im well aware that running 2 av softwares is ill advised,However it is the etymology im interested in.
Virus and malware.
Do these 2 terms not mean the same thing?
Of course they do, however, I am sure you also understand the difference between the two types of programs referred to so there is no point in derailing this topic further. 
Unfortunately it also gets things supremely wrong as it has classed the official facebook app for windows 8.1 as a virus, and I can’t even take it out of the virus chest so it’s unlikely to be usable for good.
With everything else that has gone wrong since I upgraded to avast 2014 and then windows 8.1, I’m feeling that I should never have installed avast 8 on my laptop and stuck with windows defender even with all the problems I’ve had with that.
thanks for the update real nice
Thumbs up to avast! once again… They got it exactly spot on! 8) 
Etymology :
please stop the thread crap
This latest version is running nicely on my new Win 8.1 set up.
Congrats to everyone for a great release
LOL ;D Good one Doc.
English language is not your strong point then.
Hi, I installed avast internet security, firewall does not work, an error firewall is disabled and does not turn on. Installed on a clean windows 8.1 operating system, what could be wrong? Thank you for your help.
Repair avast!:
- Control Panel → Add/Remove programs → avast!
- Click on ‘Repair’.
- Follow instructions.
- Reboot.
Hello,
At last site works appraisal well in firefox, and starts nicely fast on.
Thank Sjaak
how many times do I have to see the news popup about whatsapp being hacked? is there any option to disable those “news”?
would you believe it, avast 2014 as started blocking ipv6 teredo now, working yesterday fine, ive uninstalled, wiped all avast entries, installed again, still blocks teredo ipv6 when firewall is on, also, when using secureline it completely disables teredo, never used to with previous version, I could still use it.Thisis really peeing me off, reinstalling/repairing and nothing comes it. Does anyone know what rules to add so teredo ipv6 will work without having to turn firewall off and on first. Don’t understand why its just started blocking it though, the rules must of been there before.
Well done avast team! Running new version of avast. Running great.
I have a question in relation to updates. The main reason I went with Avast is of course it is free, but the updates are smaller in size than Trend Micro’s products.
I am assuming the virus updates are still small in the new version less than 2mb ? As I have a limit of how much I can download each month .
There are one or maybe two VPS updates a day but there are a lot of updates silently streamed (GUI>Statistics>Component Updates)
Was silent streaming updates part of Avast before this latest version ?
Streaming updates have been in since v7.