"Your computer is infected" pop up may resemble the original Windows message alert, however it is definately not. "Your computer is infected" pop up is able to infiltrate the users computer system through security holes or via Trojan malware, for example:Trojan Zlob. One should be aware of the alert messge that will appear, should the user‘ system be infected with "Your computer is infected" pop up. It will read as follows:

"Your computer is infected!

Windows has detected spyware infection! It is recomended to use special antispyware tools to perventdata loss.Windows will now download and install the most up-to-date antispyware for you.

Often when you’re infected with rogue anti-spyware like Spyware Protect 2009, you’ll see a false popup security alert like this.

Click here to protect your computer from spyware!"