Online Protection Tool is a fake pop up that may appear on the Internet while browsing for any website. It has nothing in common with real notification by Windows and actually is created to rip computer users off.

Here is what the message states:

Windows Internet Security
Your browser is under the threat of infection. Windows requires your permission to install online protection tool.
Your browser is run in unsafe mode. Running the protection mode will help you to keep your computer safe. Staying at the suspicious website is unsafe mode my lead to the loss of personal data and computer breakage. To run the web browser in protected mode windows requires installing the certified antivirus scanner software and online protection tool.
Name: online protection tool
Publisher: Microsoft windows

The graphical user interface is quite deceiving. It actually is very similar to a legitimate notification by Windows. However, do not take it seriously. This message is fake, so do not attempt to install anything the message recommends you to install.

If you received this pup up on your desktop, you are strongly advised to download a legitimate anti-spyware program which will clean your computer form Online Protection Tool and other malicious infections.