Microsoft released the first official service pack for Windows 7 today. This is an important update that includes previously released security, performance, and stability updates for Windows 7. SP1 also includes new improvements to features and services in Windows 7, such as improved reliability when connecting to HDMI audio devices, printing using the XPS Viewer, and restoring previous folders in Windows Explorer after restarting.

The easiest and safest way to install SP1 is using Windows Update service. If you use this, then your total download size will be 750MB for 32-bit Windows 7, and 1050MB for the 64-bit version. For this, you need to click Start, click All Programs and click Windows Update. In the window that opens, click "Check for updates" on the left. In the list of updates, you will see Service Pack for Microsoft Windows (KB976932), select it and click OK. Click Install updates to start downloading and installing the update. Enter your administrator password if prompted for the same. This method requires your computer to remain connected to the internet while the update downloads and installs.