If you have the firewall set up properly, but still have network problems, continue with the Windows Network Problem Solver page.
Microsoft offers free technical telephone support for Service Pack 2.
If it doesn't, or even if it does, but you cannot find any other possible cause, do a repair installation.
The repair installation overwrites Service Pack 2 files and may leave your computer with some functions not working and a few error messages repeatedly being logged, so you should then reinstall Service Pack 2.
pr=windowsxpsp2 How to use the Automatic Recovery feature to recover your computer if the Windows XP Service Pack 2 Setup program is not completed successfully Particularly important is this site with links to OEM (Original Equipment Manufacturer) news on Service Pack 2 related issues.Table of contents Read this first Can Service Pack 2 be installed on all XP installations?Ordering the service pack on a CD Preparing for installation Cannot install Windows XP with integrated Service Pack 2 Cannot install Service Pack 2 Boot or shutdown problems after Service Pack 2 installation The Service Pack 2 firewall Networking problems after installing Service Pack 2 NET SEND messages no longer received Computer does not work properly with Service Pack 2 Programs stop working or behave differently with Service Pack 2 Data Execution Prevention (DEP) Removing the uninstall information New and revised documentation Closing remarks, comments This page deals with problems caused or triggered by the installation of Service Pack 2 for Windows XP, and this information is also relevant to Service Pack 3.At least you gain some peace and more time to look for a better solution. If that also fails or if you want to know more details, check the next subchapters below for detailed information on how to uninstall the service pack.Click on Start, Control Panel, Add/Remove Software, and make sure that you have Show Updates selected at the top, if you have that choice at all. If that fails, roll back the computer, using System Restore. To get into Safe mode, tap the [F8] key repeatedly or hold it down while the computer is booting. If you cannot or don't want to uninstall Service Pack 2, you can perform a repair installation of Windows XP.