Pls reccomend me a good antivirus and pc fixing software?

my pc has been infectd by viruses. i need a good antivirus to clean them . which is the best one. which software can fix the registry changes made to my computer by viruses?

thanks

Pls reccomend me a good antivirus and pc fixing software?kawasaki

All of these are free for home use and will work with XP and Vista.

AVG Free is the most popular free solution available at no cost to home users and provides the high level of detection capability that millions of users around the world trust to protect their computers.

Easy to use, low system resources

Automatic update functionality

Real-time protection as files are opened and programs are run.

http://free.grisoft.com/doc/2/us/frt/0

Avast-

avast! 4 Home Edition works for 60 days after the installation in demo mode. You will obtain your FREE license key by E-mail after the registration. The license key is valid for 1 year. After one year you will need to just re-register.

http://avast.com/eng/home-registration.p...

Avira-(recomended)

free-av.com 鈥?Protection and security against viruses, worms, Trojans, dialers %26 more.

http://www.free-av.com/

PC tools-(recomended)

PC Tools AntiVirus Free Edition feature highlights

Protects your PC as you are working, surfing and playing

Detects, quarantines, disinfects and destroys Viruses, Trojans and Worms