Wonder what happened to the Windows 10 build number that used to be visible in the lower right corner of the screen. I don't see it there now so I opened the system window from the control panel and the build number is not showing there either. Looked through the settings options and couldn't find the build number. As far as I know I'm using build 9926 but I can't find a number to verify it. I'm not sure when it went away as I just noticed it was gone this morning.