If you get a "PDF unsupported" error or need to repair a damaged of corrupted PDF, try these troubleshooting tips:
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Update Adobe Acrobat Reader. One of the reasons a PDF might not display properly is because your Adobe Acrobat Reader isn’t up to date. Launch the app and go to Help > Check for updates.
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Repair Adobe Acrobat installation. If the PDF still doesn’t work after updating Acrobat Reader, go to Help > Repair installation.
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Restore PDF to a previous version. Another method to repairing a damaged PDF is restoring it to a previous version. Head to the location where the PDF is saved, right click the file and select Restore previous versions.
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Convert the PDF. If you are still having no luck with repairing a damaged PDF, you can extract the information from within, then save it into a Word document. From here you reformat the information and resave as a PDF.
- Try the Print-to-PDF method. You may also try to repair your PDF by using the Print-to-PDF method to re-save it.