Install Windows 7 Service Pack 1 (SP1) - Microsoft Support
Downloading and installing Windows SP1 from the Microsoft Update Catalog. If you’re unable to install SP1 from Windows Update, you can download the installation package from the Microsoft Update Catalog and then install SP1 manually. Go to the Windows 7 Service Pack 1 download page on the Microsoft website.
安装 Windows 7 Service Pack 1 (SP1) - Microsoft 支持
获取 SP1的推荐（并且最简单）方法是在“控制面板”中的“Windows 更新”中打开自动更新，然后等待 Windows 7 通知你 SP1 已准备好进行安装。. 安装大约需要 30 分钟，并且安装中途需要重启计算机。. 若要检查是否已在电脑上安装 Windows 7 SP1，请选择“开始”按钮 ...