If you previously purchased a physical copy or a computer with Windows 7 pre-installed, you can find the key in the following places:

These keys allow you to complete the installation process, but they do not permanently activate Windows. D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV Windows 7 Ultimate E: TWMF7-M387V-XKW4Y-PVQQD-RK7C8 How to Find Your Original Key

If you have a valid key but the standard activation window fails, you can try activating through the Command Prompt:

Type the following command and press Enter: slmgr.vbs /ipk YOUR-PRODUCT-KEY To trigger the activation online, type: slmgr.vbs /ato Important Security Note