How do I determine if a computer is running XP Service pack 3

Question

Using either the registry or the file system. The reason for the restriction is that I am doing this as an MSI conditional statement.

Cheers!

Answer 1

under registry key

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion

look for key pair:

CurrentVersion = Microsoft Windows NT 5.1.2600 Service Pack 3

Answer 2

You should find enough information to determine the OS service pack (in the worst case you can always use the build string) in the following registry key:

HKLM\Software\Microsoft\Windows NT\CurrentVersion