蓝屏死机
MS Antivirus will also occasionally display fake pop-up alerts on an infected computer. These alerts pretend to be a detection of an attack on that computer and the alert prompts the user to activate or purchase the software in order to stop the attack. More seriously it can paste a fake picture of a Blue Screen of Death over the screen and then display a fake startup image telling the user to buy the software. The malware may also block certain Windows programs that allow the user to modify or remove it. Programs such as Regedit can be blocked by this malware. The registry is also modified so the software runs at system startup. The following files may be downloaded to an infected computer: