Help on best free anti virus etc for windows 7

I use, and am very happy with, Microsoft Security Essentials.

avira free antivirus ,malwarebytes free, this is for spyware , pctools firewall plus free edition,great free firewall!and ccleaner for registry and windows cleaning!all free all fantastic!

After Installing OS don't pay any money for any antivirus programs!
Download & Install the follwoing 3 freewares. It forms a free complete security suite for your system!
1. Avira Anvivir - http://www.free-av.com/en/download/index.html .
2. Malwarebytes - http://www.malwarebytes.org/ .
3. Ccleaner - http://www.piriform.com/ccleaner/download .

The Best Security combo for all types of systems.

+1
Exactly the tools I would suggest.

Avira has very good internet security, real time updates, great overall protection.

Malwarebytes is one of the best malware scanners.

Ccleaner is a great all purpose tool. The most useful tool is probably the registry cleaner.

I concur with Saran and aford, save for the antu virus program. This is a personal preference, but I've never had a problem with AVG Free. I has Avira for awhile, but it seemed inept compared to to AVG, but that's just me.