Open source Windows alternative ReactOS has reached a major milestone: The operating system can now be installed directly onto an NT Files System drive partition. As reported by Phoronix , the move to NTFS clears a long-standing hurdle for the project and brings it one step closer to finally reaching beta. Prior to this latest announcement, ReactOS required users to keep a FAT32 partition for installations. A proprietary Microsoft-developed filesystem, NTFS can trace its roots back through the Windows NT family lineage starting in 1993 with Windows NT 3. 1…