.UNK File Extension

Unknown File

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What is a UNK file?

Unknown file that does not have a file association; may contain file contents from an original file that was unrecognized by any program; created typically as a default extension for a corrupted or unknown file that is found in email attachments or downloads from the Web.

More Information

NOTE: Do not attempt to open UNK files unless you are certain of their content since they may contain a virus.

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Programs that open UNK files

Original program that created the file

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