Windows 7 - Which antivirus is best for win7

Yes. But with ESET Online Scanner on Vista.

I think MS Security Essentials is really good and light.

use avira.. simple and best av on the market

Free antivirus - Avira AntiVir

.: Disable the Avira AntiVir avnotify nag screen on windows 7 x64:.

1.Start-> Control Panel
2.Administrative tools-> Local security policy
3.Click on Software Restriction Policy-> Action (at the top)-> create new restriction policies
4.Right-click additional rules (on the right side)-> new path rule
5.Click Browse and navigate to C:\Program Files(x86)\(Avira)\AntiVir PersonalEdition Classic\ and double-click avnotify.exe
6.Set the security level to Disallowed-> apply-> ok

removing splash screen on startup

1.Open regedit and navigate to [HKEY_LOCAL_MACHINE\SOFTWARE\wow6432node\Microsoft\Windows\CurrentVersion\Run
2.In the right pane double-click avgnt and add /nosplash at the end of the path (ex. /min /nosplash)

enjoy

it is free? but why it has 30day expired date?

Yeah it's free you just need to register it every year to get new keys. go ahead and download the Avast Free Edition and register it.

Boy I have tried many. I don't use free ones. Just went form Trend Micro to Webroot A/V just to try them. T/M doesn't expire until Dec. I have always wondered why one would think that a free version would be as good as a paid version. If that was true said company would never sell a A/V or F/W. A paid for version only cost a few pinnies a day. I and my system are worth that much.

AVAST FREE woot woot

The Free AV solutions are on a par with the paid ones. The makers simply make their money in different ways. For Microsoft it ia one more reason to use their OS and for, say, Avast - they have a commercial offering for large organisations.

The fact is that in all independent and rigorous testing the free AVs are right up there with the most expensive - often getting better results than the best known paid for AV solutions.

Really for simplicity, seamlessness and reliability as well as excellent rating in independent testing MSE is a no brainer. I use Avast (free - the paid for version adds nothing that matters) and it too is reliable, easy to use and has a very small footprint.

Really I would be more wary of some of the paid for solutions, some of their testing results are at the lower end of the scale. Fact is that not one of the AV solutions offers absolute certainty, some are not a strong with some of the malware and some don't clean-up an infection as well as others.