A fairly big moment for the ReactOS project: it has just received i ts very first system call from NT6 . The system call that has been added is NtGetCurrentProcessorNumberEx, which is used for returning the processor number of the logical processor that a caller is running on. It’s unclear how long it will take ReactOS to become compatible with Windows Vista software, but it took Microsoft around half a decade to develop Vista after the release of XP and marked a major upgrade, even if it didn’t land well with users at the time. ↫ Paul Hill at Neowin It’s a milestone for sure, but not one that’s going to make a huge difference for ReactOS at this moment in time. Still, it’s a sign of things to come, even if the very nature of the ReactOS project means that whatever things are coming tend to take a while to arrive.