9600.17031, yep... Check the Start screen for the Power button or Search Button on the right side of your name.. <--This is the best way to check for Update 1..
No. This is the part of Spring update. He need to install KB2934018 and KB2959977 so the build will be: 17041.
Yeah, but 17031 is RTM, right? It's also the build of Update 1 isos from MSDN.. So KB2934018 and KB2959977 are like "supplementay updates".. I only know little about updates, sorry about that..
How about this then..? I do have KB2959977 installed but not KB2934018. Regedit says my build is 17041[b/] (see attachment). Do I need this update anyway, what's it about..? Is it a securtity update? Windows is 8.1 RTM