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Reference/ManifestSupportedOS
ManifestSupportedOS
none|all|WinVista|Win7|Win8|{GUID} [...]
Declare that the installer is compatible with the specified Windows version(s). This adds a SupportedOS entry in the compatibility section of the application manifest. The default list of Win7+Win8 will probably be updated to include newer Windows versions in the future. none is the default if RequestExecutionLevel is set to none for compatibility reasons.
You can read more about the changes in behavior on MSDN.
Command introduced with NSIS v3.0a0
