Windows 7 Service Pack 1 (SP1) is a collection of updates and improvements to Windows 7 that enhances the overall performance, security, and reliability of the operating system.
If the above method doesn't work, you can try downloading SP1 directly from Microsoft using the following link: userport windows 7 64-bit service pack 1 download
https://www.microsoft.com/en-us/download/details.aspx?id=24573 Windows 7 Service Pack 1 (SP1) is a