A research by German scientists from the AV-Test information security institute revealed a drastic decrease of the efficiency of anti-virus tools. The research included the testing of 25 anti-virus tools for home use and 8 corporate products.
Anti-virus programs managed to block 92% of low-level attacks and clean 91% of infected systems, of which only 60% were able to operate normally.
Three out of 25 tested programs could not score high enough to get a security certificate: Microsoft Security Essentials, PC Tools and AhnLabs. Another corporate solution from Microsoft, Forefront, also didn’t score high enough in the tests.
A similar alternative research was conducted by a company called Imperva in late 2012 with similarly discouraging results: all anti-virus tools of the VirusTotal service successfully detected less than 5% of malware.