if you are running windows lets face it, you need an antivirus,otherwise your computer goes to hell,but most people don´t have the money to pay for an antivirus or won´t, so here are the best 5 free antivirus out there.
Avast ! offers different levels of protection de pending of what you need, it can scan P2P downloads,outlook mail, internet mail and instant messenger conversations,avast has the useful Virus Recovery Database feature that restores infected files to their previous state by creating a database of files that can be set when the avast screensaver is running. plus it has password protection of the antivirus control and even skin support, the only bad part is that in order to update avast`s database you need to register so that you can get a free license key but that`s small price for this antivirus.
2.- AGV Antivirus
AVG Anti-virus is low on system resources, updates automatically ,provides realtime proteccion and has a system vault for infected files.
3.-Avira AntiVir PersonalEdition Classic
Avira antivir PersonalEdition is a little know antivirus that it can detect dialers and phishing attempts and rootkit removal in addition to the standard computer virus proteccion, it works in windows xp`s 32/64 editions and linux.
4.- Comodo AntiVirus
Comodo AntiVirus is a free offering from the suit of freeware tools that is produced by comodo.com , it can Detect and eliminate viruses from desktops and networks, Constantly protects with real-time On Access scanning,has a heuristic scanning tool,blocks malware before it can run,daily update of virus definitions,Etc.
bitdefender has a free version for either windows or linux