Windows Activation is a trojan claiming to be a program that activates Windows.
It starts off being installed by users. When it is installed, an icon will appear on the desktop. A message will then be displayed, claiming that the user needs to activate Windows within 1 day to continue using all Windows features. It will then display 3 buttons, "Activate Windows Online Now", "Ask me later" and "Activate". When the user clicks Activate, a green bar then loads, then displaying a message saying "Windows Helper is unable to activate Windows Contact Support".