Two issues in the code

1. 
```c
LPWSTR lpwStream = (LPWSTR)DS_STREAM_RENAME;
fRename.FileNameLength = sizeof(lpwStream);
```

sizeof(lpwStream) is always 8 bytes on 64-bit OS

2.
```c
FILE_RENAME_INFO fRename;
RtlCopyMemory(fRename.FileName, lpwStream, sizeof(lpwStream));
```

The FILE_RENAME_INFO.FileName buffer need to be allocated by yourself
