Microsoft is beginning to warn users of a fake anti-virus application called "Security Essentials 2010," which is almost the same name as the company's own security suite. The fake anti-virus software is actually the trojan Win32/Fakeinit. When installed, the trojan will stop processes, make small changes to the Registry and change the user's wallpaper to this:

According to Microsoft Security Agent, David Woods:

"Well, it had to happen eventually. One of the oldest tricks used by rogue antivirus products is to use a similar name as, or have a similar look and feel to, legitimate security software. It’s been commonplace for them to mimic the Windows Security Center. So it was inevitable that the day would arrive when a rogue would masquerade as something similar to Microsoft Security Essentials. If anything, it surprises me a little that it’s taken so long."

Microsoft has said that the genuine Security Essentials software will remove the trojan if found.