rajrulesdear said:
welll pimpom,
then how can one detect those viruses and protect our computer?
but how will i came to know that system is affected , if AV didnt detect any virus?
Unfortunately there is no 100% guaranteed way to detect, block or remove all viruses and related malware.
If you suspect that your AV prog may have been infected, one way to check is to install another AV prog and scan. E.g., if you've been using PC-cillin, install AVG.
Some viruses (virii for the grammatical purist) can hide as a code in the system registry even if all infected files appear to have been removed. To remove this kind of infection, Trend Micro, the makers of PC-cillin, has system cleaners available for free download at their website. There are two versions : tsc.exe for those using PC-cillin, and sysclean.com for those who are not using PC-cillin. Sysclean needs the virus pattern file which can be downloaded separately.