I have a Toshiba laptop. I know my computer have been in infected by some virus and spyware cookies. I used to use many different software to scan and stop the infection in my computer, but unsuccessful. Everytime I scan my computer, after 5 or 10 minutes, my computer is automatic shut down. I don’t know why. I think the reason is because when I scan to a specific virus or spyware which is important for running other programs, the scanning software affects to them, so they cause the shutting down of my computer. Am I right? If so, could you help me to solve this problem, and show me another way to scan, kill and stop virus and spyware without cause shutting down computer? Do you know any free software I can use?