Installing this Release of Windows Server 2008 R2 with Service Pack 1

Updated: February 16, 2011

Applies To: Windows Server 2008 R2 with SP1

This document provides information about the Windows Server® 2008 R2 operating system with Service Pack 1, including steps to take prior to installation, installing the Service Pack, and how to uninstall the Service Pack. The Service Pack installation wizard guides you through the actual installation steps. This Service Pack updates all editions of Windows Server 2008 R2.

Before you start installing the Service Pack

Before you install Windows Server 2008 R2 with Service Pack 1, follow the steps in this section to prepare for the installation.

  • Ensure that your hard drive has enough free space for the installation. Refer to the following chart for required disk space and download package sizes. Because disk space usage varies greatly depending on a number of factors unique to your deployment, you should consider these values an absolute minimum. Additional disk space may be required if you have installed language packs. Other factors that may require more disk space include the amount of RAM installed, servicing requirements (that is, the number and frequency of updates you plan to install), and the number and type of non-Microsoft drivers or tools.

    Installation method Approximate disk space requirements Download size for Windows Update package Download size for standalone package

    Stand-alone installation

    • x64-based: 7.4 GB

    • Itanium-based: 3.6 GB

    • Not applicable

    • Not applicable

    • X64-based: 903 MB

    • Itanium-based: 511 MB

    Windows Update

    • x64-based: 850 MB

    • Itanium-based: not applicable

    • x64-based: 95.7 MB

    • Itanium-based: not applicable

    • Not applicable

    • Not applicable

  • Use an administrator account. Log on to your computer using an administrator account, make sure all other users are logged off the computer, and close all open programs.

  • Disconnect UPS devices. If you have an uninterruptible power supply (UPS) connected to your destination computer, disconnect the serial cable before installing the Service Pack. Setup automatically attempts to detect devices that are connected to serial ports, and UPS equipment can cause issues with the detection process.

  • Ensure availability of power. If you're using a laptop computer, connect it to an AC electrical outlet and don’t unplug or restart the computer during installation.

  • Update any device drivers as necessary. You can do this by using Windows Update in Control Panel, or by going to the device manufacturer's website.

  • Back up your servers. Your backup should include all data and configuration information that is necessary for the computer to function. It is important to perform a backup of configuration information for servers, especially those that provide network infrastructure, such as Dynamic Host Configuration Protocol (DHCP) servers. When you perform the backup, be sure to include the boot and system partitions and the system state data. Another way to back up configuration information is to create a backup set for Automated System Recovery.

  • Disable your virus protection software. Virus protection software can interfere with installation. For example, it can make installation much slower by scanning every file that is copied locally to your computer.

Installing and uninstalling the Service Pack

Choose the installer appropriate to your computer, whether it is x64-based or Itanium-based.

To install the Service Pack

  1. On the Install Windows Server 2008 R2 Service Pack 1 page, click Next.

  2. Follow the instructions on the screen. The computer might restart as part of the installation. Do not unplug or shut down the computer during the installation.

  3. Once the installation is complete, reactivate antivirus protection.

To uninstall the Service Pack

  1. Click Start, click Control Panel, and then click Programs.

  2. Under Programs and Features, click View installed updates.

  3. On the Uninstall an update page, click Service Pack for Microsoft Windows (KB976932), and then click Uninstall.

  4. Follow the instructions on your screen.

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