Hello, I have a question about protection. I am formatting and will install Windows 7 64 Bit on my PC. My question is how do free anti-viruses or internet securities compare against the paid ones and if I install for instance Avast Free 2013 how does it compare against my Kaspersky Anti-Virus for Windows Workstations 6.0? Are there any worries that my PC will be insecure? Do anti-viruses offer web protection? Are there any performance differences between free and paind anti-virus softwares?