Windows 7 - Which antivirus is best for win7

I've been using Avast (currently Version 4.8) for two years now and it is the only antivirus software that I'm comfortable of using.

I was able to use AVG (Free), Nod32, PCCillin (Trendmicro), Antivir, and MSE, but I find Avast the best among those. No nags, detects and blocks viruses (via web shield), relatively uses minimal memory, among others. In the future I'm certain that I'll still be using this brand of AV.

ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0
ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0
ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0
ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0
ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0
ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0 ESET SMART SECURITY™ 4.0.467.0

It's light in performance, quick pc startup, simple, fast scanning time, low resource scanning cost (I can do everything even plays Oblivion with my PC while it is full computer scanning), top awards in detecting malwares, top awards in removing malware, top awards in performance, top awards in proactive. It handles all 59 malwares I encountered n collected since last year. Only Norton Internet Security 2010 that is closing in to ESET.

how good is mcafee total protection 2009...does it work on windows 7 ?

As good as any and it is compatible with Win 7 x86 and x64...plus Vista x86 and x64 and XP x86 only, Win 2000 SP4 only.

In my opinion, Avast is the #1 antivirus. Just make sure the update setting is set to "automatic". It will update nearly every day. I'm evaluating MSE on my XP laptops, not enough time has passed to use it on my new PC, but it seems to do good on my laptops. One thing that I don't like about it is that it will disable programs that it deems a risk, even if it violates any EULA agreement. I haven't had this problem yet, but the first time that I do and the risk is not credible, MSE will be trashed by me. But regardless of whatever antivirus you install, if you don't set it up properly and scan on a regular (three times per week minimum) basis, it won't do you much good. If you have one where you can schedule scans, by all means do so.

Another vote for Avast.
I used it in Vista and kept it through the upgrade.
That being said, for the sake of experiment I've used the new Microsoft AV on my eldest's Win 7 machine and it seem fine.

This was a question I've been asking myself... Until I got Microsoft Security Essentials.

My very first antivirus was AVG (back in 2004). Needless to say I hated it's guts XD
I used Avast Home Edition for a very long time, about three years. Then one day I simply switched to BitDefender, and OH MY GOD did I enjoy it! It found over 550 malware files, rootkits and crap, I was surprised that WinXP even worked... Never used Avast again! After the trial period I was researching the internet for something else and gave NOD32 a try. It bugged me to no end about a certain "trojan" in operating memory, which ended up actually being a really bad rootkit.
But now that I have MSE, I am quite satisfied with it.

Although, there is one small piece of software I like to run from time to time just in case. A small program called ComboFix. It's the most powerful piece of antivirus software I ever used, and all I had to do is double-click the .exe icon

So no matter what antivirus you use, try out ComboFix as a manual "just in case" system scanning process. It never failed me

how about Kaspersky?

Gwahahaha, over my dead body XD
Seriously, not in a million years.

I am using ESET smart security, I am happy with it and it's really Good.