What is .DWN file extension?
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.
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.
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.