Help, Virus! Hi, everyone! Please, I need your help and advice... Last Sunday my anti virus program Avast discovered a virus Trojan on my computer, somewhere in the system files of the Windows. It was deleted but the Windows stopped working well. So we had to reinstall the Windows and other programs. My question is: How could that virus enter my computer? Through Internet or e-mail? And why didn't my antivirus program notice it at once? Well, I don't want it happen to me again. So what should I do?