For years, I use Kaspersky and was always satisfied. But the 2013 version is just plain junk. After you install and activate the program has placed my entire PC lame. The CPU usage increases to 100%. The Internet does not work anymore. Great. Why do I need antivirus software if I anyway no longer brings me to the internet? After researching in various professional forums my problem is not an isolated case. And the problem can be easily also not correct. Amazon does not accept my complaint, Kaspersky is also no help. Conclusion: Almost 30 euros for anything issued, and I surf now with a free program. I'm pissed. Kaspersky? Never again !!!