If your primary need is to PowerPoint files on any computer, you're in luck. Microsoft created an official tool for exactly this scenario: the Microsoft PowerPoint Viewer 2003 .
As a cloud-native platform, Google Slides requires zero installation and can be accessed from any device. It allows users to download files in .ppt or .pptx formats for offline use when paired with the Google Docs Offline browser extension. Conclusion Microsoft PowerPoint 2003 - Portable Version