"Good Low Impact Antivirus program but see below"
Version: ClamWin Antivirus 0.97.8
Very low resource usage.
Will run under Windows Server 2003.
No annoying pop ups or nag screens.
No "real time" protection.
This free Anti Virus program has the lowest resource usage of any program that I have tested, probably because it does _not_ offer real time scanning.PS: A full scan will take several hours, but this can be scheduled for hours when nobody will be using the computer.
It is also the *only* free anti virus program that will run under Windows Server 2003.
The low impact of ClamWin is due at least in part to the fact that there is no real time scanning, so users of ClamWin should be well versed in safe computing. Anything that is downloaded from the net, or even transferred over a network or USB drive should be manually scanned before opening or executing it. This is easily done by right clicking the file or folder and choosing "Scan with ClamWin Free Antivirus" from the pulldown menu.
The main problem with ClamWin and why I gave it only 3.5 stars is the high number of false positives. Make *sure* that you do not sent it to delete suspect files! Set ClamWin to "quarantine" any suspect files. Then after doing a scan if you find that one of your programs does not operate correctly, you can restore the file to the original location.
Bottom line: The first choice for someone with an older machine that can't take the overhead of real time antivirus programs, but the user must practice safe computing in order to be fully protected.
Updated on Oct 8, 2013
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