It takes about 30 minutes to install, and you'll need to restart your computer about halfway through the installation. The recommended (and easiest) way to get SP1 is to turn on automatic updating in Windows Update in Control Panel and wait for Windows 7 to notify you that SP1 is ready to install.
We recommend you move to a Windows 11 PC to continue to receive security updates from Microsoft.
Support for Windows 7 ended on January 14, 2020
