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You double-click a PDF, and nothing happens – or worse, you get an error. This is a common issue, but in most cases, it’s easy to fix. Here are the most likely causes and how to resolve them quickly.
Fix: Download and install a free PDF reader like Adobe Acrobat Reader or Foxit Reader.
Fix: Re-download the PDF or ask the sender to re-export it.
Fix (Windows):
Right-click the file → Open with → Choose another app
Select your PDF reader and check “Always use this app”
Fix:
Try a different browser.
Download the file and open it with a desktop PDF reader.
Fix:
Close unnecessary applications.
Use Adobe Acrobat DC for better performance.