2 ms·

2000 (5), XP (5.1), Vista (6), 7 (6.1), 8 (6.2), 8.1 (6.3)

• trurl42 12y ago
  And Windows 10 will be 6.4. It just doesn't make any sense.
  • Arnavion 12y ago
    One popular theory is that there is software out there that checks for Windows version == 6 instead of >= 6 when deciding to enable features for Vista and above. This was definitely true of libcurl at one point, for example.
    • hamburglar 12y ago
      In that case, my vote is for Windows X to be version 6.3.1.