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The RtlIsNtDdiVersionAvailable DDI fails whenever the passed Version parameter has the LSB byte as non-zero. This makes tests such as
RtlIsNtDdiVersionAvailable(NTDDI_WIN10_RS4) useless because they will always return false.
This looks to me like a bug, but perhaps it is intentional for "compatibility" or other reason. I note that the RtlIsNtDdiVersionAvailable documentation page does not list any of the NTDDI_WIN10_* values as accepted, so perhaps it is intentional.
Frankly this limitation (intentional or not) makes RtlIsNtDdiVersionAvailable pretty useless for many use cases.
Anyone else has observed something similar?
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