suggst on antivirus softwares

i am using the internet with avast. i want a new antivirus software any suggetions to me to increse speed of system.

I am using the new AVG 9.0 (free version) seems to fine here.

http://free.avg.com/gb-en/homepage

and all of these are free too:

Microsoft Security Essentials
AntiVir Free
Avast Home Edition
Panda Cloud Antivirus
PC Tools Antivirus Free
Rising Antivirus Free

The following are Internet Security Suites which are also free:
Comodo Internet Security
Fortinet Client Standard

any reason in particular why you want to change from Avast ? I've been using it for years without a problem.

Nod 32 here.

Avira is pretty good for a freebie.

I use Kaspersky Internet Security 2010 myself though, it's quite cheap and does the job well.

My vote goes to avast 5.0 free edition
Avira lacks network security,
Nod 32 is best of all if u r buying it....
where as kaspersky is a lil bit annoyed by sum virus(personal exp) and failed to heal infection

I am also using a McAfee antivirus. I think it is proper enough for your viruses. According to me there is no antivirus which can protect your pc fully. The partition which is having windows or operating system files is the main place for viruses and this is difficult for the antiviruses.

i fin ESET SMART SECURITY really user friendly and easy to use