Execute different command in Inno Setup Run section based on Windows version

Question

I need to know if the Windows is XP, 7, 8, 2003, 2008 or 2012, because depends on version I will run a specific command.

I tried to install IIS in Windows 2008, but

Answer 1

Use the MinVersion and OnlyBelowVersion parameters in the [Run] section:

[Run]
; for Windows 2012 and newer:
Filename: pkgmgr; Parameters: "/iu:..."; MinVersion: 6.2
; for older versions (Windows 2008)
Filename: pkgmgr; Parameters: "/iu:..."; OnlyBelowVersion: 6.2

Learn the Windows version numbers.