MigrateOOBELanguageToInstallationLanguage

INT64 __fastcall MigrateOOBELanguageToInstallationLanguage(){
  WCHAR v0; 
  NTSTATUS v1; 
  WCHAR v2; 
  unsigned __int16 v3; 
  __int64 i; 
  __int16 v5; 
  unsigned __int16 v6; 
  WCHAR v7; 
  PULONG ResultLength; 
  void *KeyHandle; 
  ULONG DestinationString; 
  struct _UNICODE_STRING DestinationString_8; 
  struct _UNICODE_STRING ValueName_8; 
  struct _OBJECT_ATTRIBUTES ObjectAttributes; 
  __int64 v15; 
  __int16 v16; 
  char KeyValueInformation[8]; 
  ULONG DataSize; 
  char Data[516]; 
  *(_QWORD *)&ObjectAttributes.Length = 48i64;
  v15 = 0i64;
  v16 = 0;
  KeyHandle = 0i64;
  *(_QWORD *)&ObjectAttributes.Attributes = 576i64;
  DestinationString_8 = 0i64;
  memset((INT64)KeyValueInformation, 0i64);
  DestinationString = 0;
  ValueName_8 = 0i64;
  RtlInitUnicodeString(
    &DestinationString_8,
    L"\\REGISTRY\\MACHINE\\SYSTEM\\CurrentControlSet\\Control\\NLS\\Language",
    v0);
  ObjectAttributes.RootDirectory = 0i64;
  ObjectAttributes.ObjectName = &DestinationString_8;
  *(_OWORD *)&ObjectAttributes.SecurityDescriptor = 0i64;
  v1 = ZwOpenKey(&KeyHandle, 0x2001Fu, &ObjectAttributes);
  if( v1 >= 0 )
  {
    RtlInitUnicodeString(&DestinationString_8, L"InstallLanguage", v2);
    v3 = PsInstallUILanguageId;
    for( i = 3i64; i >= 0; --i )
    {
      v5 = 55;
      v6 = v3 & 0xF;
      if( v6 <= 9u )
        v5 = 48;
      v3 >>= 4;
      *((_WORD *)&v15 + i) = v6 + v5;
    }
    if( ZwQueryValueKey(
           KeyHandle,
           &DestinationString_8,
           KeyValuePartialInformation,
           KeyValueInformation,
           0x210u,
           &DestinationString) >= 0 )
    {
      RtlInitUnicodeString(&ValueName_8, L"PreviousInstallLanguage", v7);
      LODWORD(ResultLength) = DataSize;
      ZwSetValueKey(KeyHandle, &ValueName_8, 0i64, 1ui64, Data, (UINT64)ResultLength);
    }
    LODWORD(ResultLength) = 10;
    v1 = ZwSetValueKey(KeyHandle, &DestinationString_8, 0i64, 1ui64, &v15, (UINT64)ResultLength);
    if( v1 >= 0 )
      v1 = 0;
  }
  if( KeyHandle )
    ZwClose(KeyHandle);
  return(unsigned int)v1;
}

Referenced by: