.DWN File Extension

Firmware Update File

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What is a DWN file?

Software update file that is used to update the firmware of a hardware device, such as a router, modem, or graphics card; typically accessed by the hardware's associated setup program.

More Information

Since DWN files are referenced by a hardware setup program, they should not be opened manually. Instead, the file should be selected within the setup program at the beginning of the update process.

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Programs that open or reference DWN files

Firmware updater

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