Free Anti-Virus Comparison ReviewGuest_Jim_* - April 9, 2013
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I was first exposed to the ClamAV antivirus when I dual-booted Ubuntu as it is available for Linux. I remembered that so I decided to add it to the list of Windows antivirus programs for this write-up. ClamAV itself is not available for Windows though, but Immunet is, and it uses ClamAV for its scanning. Unfortunately it is not tested by AV-Test.org, so I cannot compare its detection performance to the other programs.
Without a doubt, this is one of the simpler programs on the list with few special features, but it does have your basic real-time protection, though even e-mail scanning capabilities are limited to the paid version. This lack of features is not necessarily a weakness though as it is designed to be light on your computer. Of course that only applies to the real-time protection. During a full scan, 'light' does not matter; being thorough and fast does. You do have the basic options of scanning archives along with some cloud scanning capability. Something some antivirus programs are now doing is connecting to a remote server for help identifying suspicious, but unidentified files. The ClamAV engine operates offline though, so you can still run a scan without a connection.
At roughly 34 minutes to complete a full scan, it certainly is fast. The resource usage however is not particularly light as my data shows the CPU usage jumping up to and holding at 100% for a time. While running a full scan though, Immunet does show you how much of the CPU is being used, and it does not remain at 100% for the entire scan. It is still the only one of these programs that reached and maintained that much CPU usage though. The other software would hit the ceiling briefly before falling again. Unfortunately, one thing I do have feel I have to point out is that it reported scanning the fewest files of all of these programs at just 177,157, which is less than half the next best and about a tenth the top two scanners.
Assuming Immunet is competent at detecting viruses and other malware, it is not a bad choice for additional real-time protection. That actually seems to be what it was designed for. As a primary scanner though, it leaves me unimpressed with its low file count and high CPU usage.