@Eric March: I agree that avast has many false-positive when it comes to un-official products like self-written tweak programs, keygens, crack, proxy etc… and in other hand so many missed samples. But do you know any program which has 0 FPs and 0 Missed samples? Sure no!
That’s why I don’t live based only on one Antivirus in my end (No!, I’m not running more than one real-time protection), but I try to secure my life as much as I can.
For example:
I use 2 On-Demand Scanner: MBAM, Hitman Pro - I’ve set MBAM to scan my computer every night after update when I’m away from that
I use web based scanners: Virus-Total via VirusTotal Uploader - to scan new files
I’ve disabled autorun feature of removable drive as system-wide
I use windows HOSTS to block bad domains and use my AV feature to lock it to prevent Hijack
I use only safe and trusted programs
I use Good browser with good extensions
So with above methods, avast could be enough for you (even that I use an antivirus from where you are, Eric!)