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How to check if Service Pack is installed in Windows Vista
http://www.vistaarticles.com/articles/517/1/How-to-check-if-Service-Pack-is-installed-in-Windows-Vista
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Published on 03/27/2008
 
How to check if Service Pack is installed in Windows Vista

How to check if Service Pack is installed in Windows Vista
1. Computer
2. Properties
3. Under Windows Edition, Service Pack installed will be listed.