What's changed in the Windows 8.1 RTM release? Summary: If you've been running the Windows 8.1 Preview for any length of time, you'll have to look closely to see the small but significant changes in the RTM code. Here are a few things to watch out for. By Ed Bott for The Ed Bott Report | September 10, 2013 -- 12:36 GMT (05:36 PDT) Follow @edbott Previous | Next Image 4 of 13 More Help This is a closer look at the "Start and apps" section of the new Windows 8.1 Help + Tips app. Topic: Windows 8 Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.