|Launch Condition: Windows 2000 or Greater?|
We only want to install this product on Windows 2000, XP or above:
<$AbortIf Condition=^not VersionNT OR (VersionNT < 500)^ Message=^Can only be installed on Windows 2000, XP or greater.^>
The condition "not VersionNT" is checking to see if the "VersionNT" property exists (it won't for WIN95, WIN98 and WINME) and "VersionNT < 500" is checking if the NT version is less than "5.00" (correct value for WIN2000).
See the online documentation for a list of operating system related property values.