Almost 26 percent of computers scanned last week at the Infected or Not website (http://www.infectedornot.com) with the NanoScan and TotalScan online scanners were infected with some kind of active malware. This implies not only that the computer was infected but also that the malware was operating maliciously at the moment of the scan.
Moreover, with respect to the total number of computers scanned, over 33 percent were infected even though they had an antivirus solution installed. The figure for those systems without protection was over 43 percent.
The distinction between active and latent malware is very important. Active threats are those that are actually causing damage to the user at the moment of the scan. These could be anything, from memory-resident banker Trojans stealing confidential passwords, to bots sending spam or attacking other computers without the user realizing.
Another good reason to check the PC with NanoScan.