Hello, my sons computer has many Trojans. He got them mostly i think from U Toob and My space. He has Avast 4.7 and when virus would come up it said to Move To Chest. Instead he would hit delete. HIs computer is a mess with popups everywhere. I did a Boot scan a normal scan and did the recomended action. Still there. I restored his comp. to the original state of when we bought it. Then did all Microsoft security updates. The popups still continue. What will get rid of this crap?