Hi. This is an strange case. I suggested my best friend to use Nod32 and she did it. Here is the history: First: she installed Nod32, actualized it and told me: "all is ok. No viruses found on my PC." Second: two days later, I advised her to install Shell power. Then, Amon announced: No virus... But scanner using advanced heuristic said: virus unknown found in operating memory (MEMORIA OPERATIVA IN SPANISH). Virus' name: NewHeur_pe. I have 3 questions: 1.- Is it a logical situation? Amon can not detect a virus but Scanner using advanced heuristic YES?? 2.- Scanner doesn't say anything about MBR or CRC. What is happening in MBR AND CRC? Is there a virus too? 3.- And now? What should we do? Of course: Both (my friend and me) are novices. Could you please help us? PC is crashing!!!!! Greetings from México. PD: Should I post this in the virus Forum too?