Windows 7 Service Pack 1 (SP1) is an important update that includes previously released security, performance, and stability updates for Windows 7. Installing SP1 helps keep Windows 7 up to date. For more information, see What's included in Windows 7 Service Pack 1 (SP1).
How to get SP1
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. It takes about 30 minutes to install, and you'll need to restart your computer about halfway through the installation.
To learn if Windows 7 SP1 is already installed
- Click the Start button , right-click Computer, and then click Properties.If Service Pack 1 is listed under Windows edition, SP1 is already installed on your computer.
Disk space requirements
Make sure you have enough free disk space to install SP1 (even though much of that space will be reclaimed after the installation). If you need to create free disk space, go to Strategies for freeing disk space on the Windows website.
Estimated amount of free disk space required
Downloading SP1 from the Microsoft website
Installing SP1 using an installation DVD