: If your PC came pre-installed with Windows 7 (e.g., Dell, HP), it likely has a Certificate of Authenticity (COA) sticker on the casing with the product key. Many OEM devices also use a BIOS marker (SLIC table) to trigger automatic activation if reinstalled with the original recovery media. System Requirements (32-bit)

Click the button, right-click Computer , and select Properties . Scroll to the bottom and select Activate Windows now .

If connected to the internet, choose and enter your 25-digit product key.