Seems like the bad guys pushing for fake antivirus software are not done yet.

We received several reports from the North American region earlier today about users being victimized by a rogue antispyware, which these users have downloaded after they have somehow been convinced to click on malicious links. These links point to malware that caused overt signs (such as popup balloons and modified wallpapers) to appear in the PC suggesting that the system has indeed been infected. This is not goodwill, though — because downloading the ‘trial version’ only scans the system. To remove the infection the user will have to purchase the entire antispyware for real money. Users may be infected via spammed email messages, spammed instant messages, or even via ads served in social networking sites.