- You upgrade your Windows XP Home-based computer to Windows XP Professional.
- You reinstall Windows XP on your computer.
- You perform a repair of Windows XP on your computer.
After you reinstall the service pack, restart your computer.
For additional information about how to perform an in-place upgrade (reinstallation) of Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
978788 How to perform an in-place upgrade (reinstallation) of Windows XP
Article ID: 822520 - Last Review: Mar 29, 2017 - Revision: 3