Alguma chance de você ver um slogan no canto inferior direito da tela dizendo "Esta cópia do Windows não é original"? Se assim for, é hora de ativar o Windows .
To activate by using a direct connection
Open Windows Activation by clicking the Start button , right-clicking Computer, clicking Properties, and then clicking Activate Windows now.
If Windows detects an Internet connection, click Activate Windows online now. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
Type your Windows 7 product key when prompted, click Next, and then follow the instructions.