Right-click on Computer and select Properties. This will open the System Properties window. You can also press ⊞ Win+Pause.   You must enter a valid 25 character key in order to activate your copy of Windows. Your product key may be located underneath your laptop, on the back of your computer case, on the disc case for your Windows 7 installation DVD, or in the Windows 7 manual.  If you downloaded the software online, then you will find it in your confirmation email. If you cannot find your product key, you may need to purchase a new one. Next. Select “Use my modem to connect directly to the activation service.” You may be prompted to enter an administrator password. If so, enter the password, and click OK. Click Next to connect and attempt to activate. You will hear your modem turn on and connect to the activation service. The activation process may take a few moments. Once it has been completed, the activation window will display a confirmation message. To double-check that you are activated, open System Properties again (Right-click on Computer and select Properties). The bottom of the window should show the message “Windows is activated”.
स्टार्ट (Start) बटन क्लिक करें: विंडो में नीचे मौजूद “Activate Windows now” लिंक पर क्लिक करें।  Activation मेन्यू से “Show me other ways to activate” चुनें।  विंडोज 7 की प्रोडक्ट की (product key) एंटर करें:  .Next क्लिक करें: ड्रॉप-डाउन लिस्ट से आपकी सबसे करीबी लोकेशन को चुनें: