How to check which Windows service pack is installed

This article tells you how to find out which service pack has been installed on a Windows computer.

Another knowledgebase article describes how to find out which operating system you have installed.

What to do

• From your Windows desktop, double-click 'My Computer'.
• Select Help|About Windows
• The 'About Windows' panel displays a variety of information, including which service pack is installed.

Note: If you are in Windows XP 'Category' view, you must click Start|My Computer, to open 'My Computer', then continue as above.