Sorry if this is in the wrong place, i just thought since this was about viruses and malware...
Does anyone know if i can use Kaspersky 6, Avast, and Zonealarm 7.0 together without problems?
Haven't researched the newest update for Avast so insert whatever number is the latest.NO, do not use more than ONE active antivirus scanner at the same time as they will conflict.

Personally I recommend AVG Free or what I use NOD32.i encountered a similar problem before. my windows xp home had been underperforming for a while. so i used norton antivirus and ran a full SYSTEM scan. the results showed that i had over 300 trojans. However, norton erased them all in one clean SWEEP. I did the scan in normal mode.
What i suggest, is you uninstall 2 of the antivirus softwares, and RUN a scan again using the remaining antivirus software, and see if the threats are erased for good.ZoneAlarm is a FIREWALL, so you should keep it. As for an anti-virus, however, only one is recommended. Using more than one may make it difficult to detect and clean infections, and it may also cause problems with your computer's performance. I would go with AVG, but Kaspersky and Avast are also good choices.So, i should keep zonealarm as a firewall and install avg? Zonealarm also has an antivirus, does that mean i should disable it?Ah, didn't think about that. Yes, I think it would be better to disable it and use the AVG anti-virus instead. But it's entirely up to you, of course.

And personally, when it comes to a firewall, I prefer Comodo, but again...that's up to you.Zonealarm 7 uses the Kaspersky AV engine which in my opinion is just as good (if not better) than AVG. So I would suggest you only use Zonealarm then.
But like CBMatt said... it is entirely up to you.Basically...it's DIFFERENT strokes for different folks. But it doesn't necessarily mean that one is better than the other (we could debate this forever). Whatever you decide upon, just make sure you only have one.Could i use comodo in conjunction with zonealarm?No, you should never have two firewalls. This will create a lot of complications and it may compromise your security, as well as cause lag on your computer.