This variable identifies the version of Windows installed. It's values can be:

  • WinNT - Windows 7 & Vista /li>
  • LanmanNT - 2008 & 2008 R2 Domain Controller
  • ServerNT - 2008 & 2008 R2 Server
This variable's value is read from HKLM\SYSTEM\CurrentControlSet\Control\ ProductOptions. It can be queried by the kernel mode support function MmIsThisAnNtAsSystem. Usermode applications can query the Windows version via theVerifyVersionInfo function. Kernel-mode drivers use the RtlGetVersion function.

CI Data

Category:OS - Kernel Variable
Target Functionality:Licensing
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