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i cannot open any of my pdf files.

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All of my pdf files seem are not working. I get a message "The application cannot be started. Try reinstalling the application"

All of my pdf files seem are not working. I get a message "The application cannot be started. Try reinstalling the application"

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What are you doing? You tried reinstalling Firefox or Adobe? Are you clicking on a file you already have saved and it's not opening? Do you have Adobe set as your default app for pdfs? https://www.google.com/search?client=firefox-b-1-d&q=Adobe+set+as+your+default+app+for+pdfs