I know people have got there favorites but what is the best anti-virus at the moment?
One that does not take up a lot of resources and slows your pc down.

At the moment im using nod32,but thinking of changing it, so all suggestions welcome, don't mind paying for a good anti-virus but there is so many to choose from.
Thanks

Personally,
I prefer AntiVir Personal Edition Classic. Its free and scans quickly and thorougly. (www.free-av.com)

But don't take my opinion. Check out this thread:

Bleeping Computer Freeware Replacements for Common Applications

The above thread will help you choose a good free antivirus program.

-- Jesse

For a pay Anti Virus the one you currently have is one of the top two out there, IMHO. But the link Jesse Bassett provided has many freeware Anti Viruses that are quite good as well. Anti Viruses when it comes down to it, after finding several that are at the top of their game, end up being determined by personal choice and feel.

Check this it may provide some more info.

http://www.bleepingcomputer.com/forums/topic86457.html

Independent comparatives of Anti-Virus Software
click on the "Comparatives" link on the left

Read "And The Best Antivirus Is…." Of course these types of comparative results will vary depending on who is doing the comparison testing, what they are testing for, what versions of anti-virus software is beging tested, etc.