your computer is infected!

critical system error!
system deteced virus activities,they may cause critical system fail ure,please,use antimalware software to clean and protect your system from parasite programs, click here to get all available software.

当我把鼠标移向屏幕右下角的红色告警符时出现＂Virus Alert!"(图中右侧用黑色笔圈起来的部分）．