hey. I have followed the initial instructions on the forums to reboot and run the four software tools. i have pasted in the logs from the HJT and the AVG anti spyware programs. SYMPTOMS - Critical System errors in system tray. - Security centre comes up overwriting my homepage. - Often in internet explorer i get this page is probably blocked by adware/spyware, remove it with system doctor. what do i do from here ? Thanks. Mark.