Antivirus software works by scanning your computer's hard drive and memory to look for any virus. The antivirus software, once it has found a virus, will either delete it or quarantine it. However, for the antivirus to be completely efficient, it needs to be updated. Every now and then, the software will need to access its manufacturer's website to download updates. The updates provide the latest information to the software on how to detect new viruses and eliminate. An outdated antivirus is as good as a computer with no antivirus.
However, the more powerful the antivirus software becomes, the more canny the viruses get. There are those viruses which affect the boot sector of your computer's hard drive and thus WindowsÂ® based antivirus software will not work. Then you will need special solutions.
There is also one last type of antivirus software which scans your computer from a website. These are called online virus scanners and need an internet connection.
Free Antivirus Software (Downloadable)
AVG Antivirus Free Edition
Avira Antivir - Antivirus
BitDefender - Antivirus
Clam AV - Antivirus
ClamWin - Antivirus
Cyberhawk (Now PC Tools Threatfire) - Antivirus
F-Prot - Antivirus
HandyBits - Antivirus
PC Tools Antivirus
Antidote Super Lite version - Antivirus
Online Virus Scanners
These virus scanners do not need to be downloaded and installed. They scan your computer directly from your web browser.
BitDefender Free Online Virus Scan
Freedom Free Online Virus Scan
GFI online Trojan Scanner
Jotti's Online Malware Scan
McAfee's Virusscan Online
Panda Active Scan - Online Virus Scan
PC Pitstop - Online Virus Scan
Rav Antivirus - Online Virus Scan
Symantec Security Check - Online Virus Scan
TrendMicro HouseCall - Online Virus Scan