C# Signature:

[DllImport("advapi32.dll")] static extern bool AbortSystemShutdown(String lpMachineName);

Alternative Managed API:

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Notes:

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Sample Code:

[DllImport("ntdll.dll", SetLastError = true)]

    public static extern IntPtr RtlAdjustPrivilege(int Privilege, bool bEnablePrivilege, bool IsThreadPrivilege, out bool PreviousValue);

[DllImport("advapi32.dll")] static extern bool AbortSystemShutdown(String lpMachineName);

int SeShutdownPrivilege = 19;

bool PreviousValue = false;

IntPtr STATUS_SUCCESS = new IntPtr(0);

if(RltAdjustPrivilege(SeShutdownPrivilege, true, false, out PreviousValue) == STATUS_SUCCESS){ //Sets privileges to abort shutdown

  if(!AbortSystemShutdown(null)){ //Abort the system shutdown of the local machine
    throw new Exception("Could not abort system shutdown");
  }

} else{

  throw new Exception("Could not set the SE_SHUTDOWN_PRIVILEGE");

}