Always ask which PDF reader to use for viewing

I can open the PDF. However, it then always asks me which Application to use.
I am Windows user.
Only can solve the method on Linux but not windows.
After three times it also asks.
It a bug or something I set mistake?
  • What happens when you open a PDF directly from File Explorer, rather than through Zotero?
  • I open PDF directly is OK.
    I solve this problem by
    Edit-Preference-General
    setting the Open PDFs using
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