Need a new, free antivirus. Suggestions please?

I currently have Webroot Spy Sweeper (courtesy of my mum) and it keeps detecting the same things over and over.

In particular:

Adware: Purityscan

Adware: virtumonde

Virus: Troj/Virtum-gen

Virus: W32/Virut-W

I need something that I can download to get rid of these ASAP. Someone help please!

Need a new, free antivirus. Suggestions please?internet security 2006

Kaspersky or NOD32 are the best (recent tests at av-comparatives.org). If you want a free anti-virus I recommend in order of popularity, but please choose the right one for you (install only one):

1. AVG Free

a. A simple interface (easier to use than Avast! and Avira)

b. Can detect about 82.82% of viruses

Cons: low virus detection

2. Avast!

a. Real-time protection

b. It has an option to delete a virus once found

c. Can detect about 87.46% of viruses.

Cons: Too many icons and confusing user interface

3. Avira AntiVir

a. It can detect malware better than Avast and AVG

b. It's cute umbrella icon

c. Can detect about 94.26% of viruses

Cons: A very sluggish update

Need a new, free antivirus. Suggestions please?microsoft

Try the free virus scanners at http://blog.360.yahoo.com/blog-sAFtLsc8e... and see which anti virus can remove it.
use avast free its the best do not use avg and you can also use a-squared its a anti-maleware program very good for finding trojans you can use both . i do
AVG Free is a good one I can recommend. I think the current version is 7.5. Download via this link in fact