PowerPoint found unreadable content in Presentation.pptx. PowerPoint can attempt to repair the presentation. If you trust the source of this presentation, click Repair.

What's actually wrong

PowerPoint hit a part of the .pptx package it can't parse, offered a repair, and opened a stripped-down copy — but the broken part is still sitting in the original file, so the same dialog comes back every time you open it. This loop is usually triggered by a file downloaded from the internet (Windows blocks it), a cloud-sync conflict, or one genuinely damaged XML part. Your content almost always survives; the risk is that each repair pass can silently drop a few shapes or images without telling you which.

Free fixes — try these first

1. Let the repair run, then immediately do File > Save As with a new file name and open that copy from now on — the repaired version was never written back over the original, which is why the prompt kept returning.
2. Right-click the file in Explorer > Properties > check Unblock > Apply. Files that arrived by download or email carry a security mark that makes PowerPoint distrust them on every open.
3. If the file lives in a OneDrive/Dropbox/Google Drive synced folder, copy it to your Desktop first, then open it. Sync software locking the file mid-save is a classic cause of the repeating prompt.
4. Upload the file to Google Drive, open it with Google Slides, then File > Download > Microsoft PowerPoint (.pptx). Slides rewrites the entire package from scratch, which usually flushes out the damaged part.
5. In PowerPoint use File > Open > Browse, select the file once, click the arrow next to Open, and choose Open and Repair — this is a deeper pass than the automatic prompt.

If the free fixes fail

If every repaired copy still triggers the dialog, or each pass quietly loses another shape, a damaged part is wedged deep in the package where PowerPoint's strip-and-hope repair can't fix it. Our analyzer locates the exact broken part, rebuilds it instead of deleting it, and shows you the percentage recovered before you commit to anything.