PowerPoint has somewhat of a bad reputation because many users don't use PowerPoint the way it should be used. They use PowerPoint's template or add a ton of text with bullet points and clip art. Speakers giving the presentation are the central focus. Too often, they let PowerPoint take over as their audience reads everything on the slides ignoring what they say -- which is often what you see on the slides.
Time to let go and accept the fact you're the key part of the presentation. The PowerPoint file is an assistant. It provides visual aids helping those who are visual learners. The slides also give people a point of reference in case they lose their place and struggle to understand a complex topic.
What if PowerPoint doesn't load? The computer housing the presentation dies? Can you go on without the slides?