Well I left the wireless adapter off just in case, but it started to pop up with “Illegal operation attempted on a registry key that has been marked for deletion” whenever I tried to open any executable file. So I restarted again and reconnected to the internet, I am able to freely use the computer and Avast has not informed me of any more blocked attempts by Sirefef-All which were occurring almost every 20 min. before. Thank you, do you believe the system is cleaned now?