How to activate Windows 7 for free

Are you having problem some time after installing Windows 7, a black background is appearing on the background something like this :

Then it's because your Windows 7 operating system have passed his 30 or 90 days of trial version and now you need to activate. It costs to much to buy the "activation code" and that's why i'm going to show you a software called RemoveWAT.

RemoveWAT is a very simple software. You need to download it, extract and launch. There is a button "Remove WAT", just click it and the Windows 7 activation process will begin, after finishing your computer is going to restart and that's it.