The Windows 10 upgrade text says 'Your PC will restart several times. Sit back and relax'. I tend to tell people around me to just relax and a colleague said, it would be cool if it said 'just relax'. Being a slow day I said 'challenge accepted!'
Tools required:
Resource Hacker http://www.angusj.com/resourcehacker/
Once installed open from the media Sources\en-us\setupplatform.exe.mui and edit the String Tables
From there you can edit the string table, unfortunately emjis don't translate across (??).
