public static void EnablePrivilege(SecurityEntity securityEntity) { var securityEntityValue = GetSecurityEntityValue(securityEntity); try { var locallyUniqueIdentifier = new NativeMethods.LUID(); if (NativeMethods.LookupPrivilegeValue(null, securityEntityValue, ref locallyUniqueIdentifier)) { var TOKEN_PRIVILEGES = new NativeMethods.TOKEN_PRIVILEGES(); TOKEN_PRIVILEGES.PrivilegeCount = 1; TOKEN_PRIVILEGES.Attributes = NativeMethods.SE_PRIVILEGE_ENABLED; TOKEN_PRIVILEGES.Luid = locallyUniqueIdentifier; var tokenHandle = IntPtr.Zero; try { var currentProcess = NativeMethods.GetCurrentProcess(); if (NativeMethods.OpenProcessToken(currentProcess, NativeMethods.TOKEN_ADJUST_PRIVILEGES | NativeMethods.TOKEN_QUERY, out tokenHandle)) { if (NativeMethods.AdjustTokenPrivileges(tokenHandle, false, ref TOKEN_PRIVILEGES, 1024, IntPtr.Zero, IntPtr.Zero)) { var lastError = Marshal.GetLastWin32Error(); if (lastError == NativeMethods.ERROR_NOT_ALL_ASSIGNED) { var win32Exception = new Win32Exception(); throw new InvalidOperationException("AdjustTokenPrivileges failed.", win32Exception); } } else { var win32Exception = new Win32Exception(); throw new InvalidOperationException("AdjustTokenPrivileges failed.", win32Exception); } } else { var win32Exception = new Win32Exception(); var exceptionMessage = string.Format(CultureInfo.InvariantCulture, "OpenProcessToken failed. CurrentProcess: {0}", currentProcess.ToInt32()); throw new InvalidOperationException(exceptionMessage, win32Exception); } } finally { if (tokenHandle != IntPtr.Zero) { NativeMethods.CloseHandle(tokenHandle); } } } else { var win32Exception = new Win32Exception(); var exceptionMessage = string.Format(CultureInfo.InvariantCulture, "LookupPrivilegeValue failed. SecurityEntityValue: {0}", securityEntityValue); throw new InvalidOperationException(exceptionMessage, win32Exception); } } catch (Exception e) { var exceptionMessage = string.Format(CultureInfo.InvariantCulture, "GrandPrivilege failed. SecurityEntity: {0}", securityEntity); throw new InvalidOperationException(exceptionMessage, e); } }