Norton Internet Security
Recent testing conducted by PassMark Software found the 2009 version had the least impact on system performance. As noted earlier, Symantec funded the testing and provided some of the scripts used. Warner's scripts were also used to test file read/write time. The second and third ranked suites were ESET Smart Security 2008 and Kaspersky Internet Security 2009, respectively. Systems were benchmarked with a clean installation of Windows Vista, then again with a security suite installed. The 2009 version had the least impact on boot time, the fastest scan speed, lowest memory utilization, and the program itself installed the fastest out of its competitors. However, the 2009 version had the second most impact on file read/write time, as highlighted by Warner earlier.