Take the 2-minute tour ×  How do I upgrade a Windows 8 machine
without a network connection to Windows 8.1?  share|improve this
question You should be able to use
go.microsoft.com/fwlink/p/?LinkId=271128 and the key contained
in the accepted answer to this questionr:
superuser.com/questions/661261/windows-8-1-fresh- install-with-
windows-8-licence in order to do this. After your upgrade is
finished you will have to change the license back to your
Windows 8 installation described by the accepted answer here
superuser.com/questions/650019/… When I can provide an answer
that isn't all links I will post an answer. –  Ramhound Oct 17
'13 at 17:42 I don't think any of you have noticed that using
the ISO, we lose all non-metro-applications. It's just as if we
did a refresh: we have to reinstall all non-metro-apps
afterwards. Yes, I tried it, only metro-apps survive this type
of upgrade. There is no way shown to upgrade it offline and
achieve the same as with the online upgrade. While on my first 2
win8 pro it did not