PowerPoint couldn't read some of the content in .pptx — repaired and removed it.

What's actually wrong

You clicked Repair and PowerPoint opened the deck — minus slides, images, or whole sections. PowerPoint's built-in repair doesn't actually fix damaged parts; it deletes anything it can't parse and shows you what's left. The deleted content usually still exists inside the original (pre-repair) file, which is why the single most important move is to stop saving over it. If you still have an untouched copy of the original, recovery odds are good; if you saved the repaired version over it, whatever was stripped is gone from that file.

Free fixes — try these first

1. Stop and make a copy of the original file right now. Every fix below should be tried on a copy — the original still contains the content PowerPoint's repair threw away.
2. On a Mac (yours or a friend's), open the original file in Apple Keynote, save it under a new name, then File > Export To > PowerPoint. Keynote's parser tolerates damage PowerPoint rejects — a user in an Apple Support thread reported this 'fully recovered my PPT.'
3. Upload the original to Google Drive and open with Google Slides, then download it back as .pptx. Like Keynote, Slides often reads parts PowerPoint refuses to.
4. Open a blank presentation, then Home > New Slide > Reuse Slides, browse to the original file and insert all slides — this rebuilds slides one at a time and often skips past the damage.
5. Rename a copy of the original from .pptx to .zip, double-click to open the archive, and pull your images and videos out of the ppt/media folder so the assets are safe even if the deck itself stays broken.

If the free fixes fail

When Keynote, Google Slides, and Reuse Slides all choke, the damage sits in parts every consumer parser gives up on — and PowerPoint's own repair only ever deletes them. Our analyzer reads those discarded parts directly from the raw package, rebuilds what's intact, and gives you an honest percent-recovered preview so you know exactly what came back before you decide anything.