There is another fake anti-virus that imitates "Microsoft Security Essentials". This rogue anti-virus is called "Windows Security Renewal". The fake anti-virus displays a false report of viruses, Trojans and other malicious programs on your computer and then asks you to pay for an upgrade to remove these malicious programs from your computer.
Please do not purchase this software: "Windows Security Renewal".
The fake anti-virus software will prevent you from visiting antivirus websites, block you from using Task Manager and Registry Editor in order to prevent you from removing it from your computer.
"Windows Security Renewal" Displaying a Fake Report of Potential Threats.

The "Windows Security Renewal" Prompting an Upgrade from the Trial to the Full Version

How to remove fake anti-virus "Windows Security Renewal"
Use can use the following software to remove this threat:
Malwarebytes Anti-Malware: Click here to download and install the software.