There are a couple of prep steps you should always do in PowerPoint before your presentation. First, page through your slides as if you were in presentation mode. As you rehearse, make notes in the notes area at the bottom about how you will deliver the content. Include such things as when you’ll need to navigate to another program or website. You can print Notes Pages under File, Print options.
Second, have a contingency plan for hyperlinks that require access to a network or the Internet. Whether it’s screen shots or a separate handout page, you’ll be ready if you lose connectivity.