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HP and Compaq Desktop PCs - Important Information for Updating Microsoft Windows Vista to Service Pack 2

This document contains important information about updating Windows Vista to Windows Vista Service Pack 2 (SP2).
Benefits
The major benefit of Windows Vista SP2 is to provide a better Windows Vista experience. Specifically, Windows Vista SP2 provides improvements in the following areas:
  • Improved wireless networking performance after resuming from sleep
  • Added burning support for Blu-Ray Disc media
  • Better internal searches using Windows Search 4.0
  • Improvements for recording TV in Windows Media Center
  • Added support for Bluetooth 2.1
  • Increased software compatibility
  • Improvement made to the RSS sidebar gadget
  • ... and more.
Before updating to Windows Vista SP2
Before updating to Windows Vista SP2, the following steps are recommended:
  1. Backup your files as described in Backing up Your Files in Windows Vista (in English).
  2. Create a restore point as described in Using Microsoft System Restore in Windows Vista (in English).
  3. If you have previously downloaded and installed a prerelease version of Windows Vista SP2, uninstall it using the steps described in Uninstalling Software in Windows Vista (in English).
Requirements for Windows Vista SP2
Your computer must have Windows Vista with Service Pack 1 installed and enough free disk space to install the update. The amount of free disk space needed varies by system. 5 GBs of free disk space should be sufficient for any computer. 5 GB is in addition to leaving 5% of the total disk size for use by Windows. In addition, you might be required to install a Servicing Stack Update before Vista Service Pack 2 installs.
Installing Windows Vista SP2
For people who use their computers in a home or small office environment, the best way to download and install Windows Vista SP2 is through Windows Update (in English). Downloading through Windows Update saves time and disk space by downloading only the files your computer needs - about 40% less than the full download.
In a larger business environment with multiple computers, download and save the full installation of Service Pack 2 to a CD or DVD. A full install of Windows Vista SP2 includes all files needed for compatible computers. Before downloading, you need to know which version of Windows Vista is currently installed on the computers that will receive the update - 32-bit, 64-bit, or both. Download the updates you need from the Microsoft Download Center for Windows Vista 64-bit (in English) or Windows Vista 32-bit (in English).
Known issues after upgrading to Windows Vista SP2
The following table lists issues that can occur after updating to Windows Vista SP2.
Known Issues after updating to Windows Vista SP2
Issue
Suggestion
Buffer overrun error opens while installing SP2:
Visual C++ Runtime Error: Buffer overrun detected!
Loss of sound
Reinstall the sound driver to regain sound. See Microsoft support article, How to troubleshoot sound problems that you experience after you install a Windows Vista Service Pack.
A specific software title does not work correctly
A Bluetooth device no longer works correctly
The Bluetooth item in Control Panel on a Windows Vista SP2-based computer does not work as expected when you click the item. See Cannot install a Bluetooth device after you install Windows XP Service Pack 2 (in English).
A device no longer works
Related information
Other related information is available at the following resources:

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