Windows
PDF email attachments would not open because the file association was wrong
Email PDF attachments would not open. The technician reset the .PDF association to open in Edge and also set .doc files to open in Word.
Killed once by someone from XL.net, on 2025-09-26.
Affects
Versions
- Windows
Apps
- Microsoft Edge
- Microsoft Word
What you see
- PDF email attachments no longer open
- Documents open with the wrong app or do not open properly
Why it happens
Likely Likely broken or changed Windows file associations for PDF and Word documents
When it shows up
A Windows computer cannot open PDF attachments and the default app for .PDF is not set correctly
You are in this case if:
- .pdf files are associated with Microsoft Edge instead of the expected PDF reader
- .doc files are associated with Microsoft Word after the repair
1 fix below
The steps that killed it
The steps are behind a quick check
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Someone from XL.net killed this on a Windows computer on 2025-09-26. It is written up from that one repair, so it cites no outside page.