Microsoft has published a new page on its official website where users can download and install Windows 7 along with its installation serial number! Users who download and install Windows 7 via this method will not have to face the challenge of activating the system.
1. First, go to: http://www.microsoft.com/windows/windows-7/beta-download.aspx
2. After opening the page, under "Get the download," choose either the 32-bit or 64-bit installer to download.
3. Use your Windows Live ID (default is MSN account) to log in and fill out the relevant information. Once successful, you will receive a Windows 7 serial number.