Upgrade windows 10 ltsb 2015 to 2019 July 8, 2019 16 32 64 128 Upgrade windows 10 enterprise ltsb 2015 to 2019 Windows 10 ltsb 2015 to 2019 Update windows 10 ltsc 1809 to 21h2 Windows 10 update to 22h2 Windows 10 2004 update