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Stephen664

Unknown format file error after upgrading to Windows 10

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Hello community.
After upgrading to Windows 10 i cannot open PDF extension file which is on my flash drive. 
A warning message: "Unknown format file"
How can i remove the error or what should I do? Any suggestions ideas would be great.

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See if you can right-click the file and then choose "Open with" and select Adobe Reader--if you have it. The built-in Edge web browser should also be able to open it, as well.

Do ANY PDFs open on your system? Or is it just this one?

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Sometimes a pdf file becomes damaged or contains corrupt data. If you downloaded the pdf from the Web or received it in an email, download the pdf again or ask the sender to resend it. Copy the file directly to your hard drive, rather than to a thumb (portable) or network drive. Then, open the new copy directly from your hard drive. Also you can use pdf viewer tool, quite light weight and versatile.

Edited by Rob839

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