One function is to prevent the virus infecting antivirus computer. Although today many have proactive antivirus detection (ability to detect new viruses before they hit the virus database) is good, but if the computer is already infected with the virus, typically installed antivirus can not do much. There are several ways if the computer is already infected with the virus, and the virus is already installed can not handle.
1. Install or use another antivirus
Use the latest antivirus program, immediately scan when done install or would be better if the update first. Perhaps to most antivirus that does not work, because the virus usually anticipate this. Alternatively, use a new antivirus.
2. Scan hard drive on another computer
If you have multiple computers or a friend who has a computer with a constantly updated antivirus, then try a scan on the computer. The best way is to remove the hard drive and installed on a friend's computer, then a whole new scan. It does require a knowledge of the tidal install the hard drive, so maybe if you have not ever going to have trouble.
3. Scan and remove virus manually
How this can be done for those who are quite familiar with the particular operating system windows, various techniques virus (spread, infect, etc.), various information about a file or directory and other computers. How this should be done via a bootable CD (Bootable CD could be used the way to 3 above or the Linux Live CD such as Ubuntu, Knoppix and others.
4. Reinstall
This may be the last alternative if the above methods can not or want a quick way. But with the completion of the re-install does not guarantee a virus free computer again, the virus could infect other programs that are installed later. In addition, if we have installed a computer program that is quite a lot, then maybe re-install takes quite a long and tiring.
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