Activation window-all in one

Windows is not genuine ? after booting black screnn appear and error seen in taskbar " this copy of windows is not genuine. don't worry  try this easy steps for activate windows

1)Click on start >right click on Computer option then select properties

2)then in properties windows click on Change product key link

3) Insert product key and click on Next button.

Activation process going on

Windows activation successful message windows appear

thanks ;)