.img file won’t mount in Windows 8? Change its extension to .zip

Uh oh, you just downloaded a disc image file, but instead of mounting it when double-clicked, Windows is showing this:

Huh? I thought disc image mounting was a native feature of Windows 8
Huh? I thought disc image mounting was supposed to “just work” in Windows 8

Fortunately, you can get around this without mounting anything:

  1. Open File Explorer
  2. Navigate to the folder containing the .img file
  3. In File Explorer, click the View tab
  4. Check File name extensions
  5. Replace the “.img” in the problematic file’s name with “.zip”
  6. Confirm the warning dialog that pops up
  7. Handle the renamed file as you would any regular zip file

The most ironic thing about the above is this error occurs for Office Professional Plus and Project 2013 files downloaded directly from Microsoft. Go figure.

UPDATE 1: According to the comments, apparently copying and pasting the file and then trying to open the copied file works also.

UPDATE 2: Per the comments the problem is a bug in the downloader, not Windows.


Author: jdrch

ISTJ, Rice Owl, UF Gator, mechanical engineer. STEM, sports, music, movies, humor. Account mine only & unaffiliated.

29 thoughts on “.img file won’t mount in Windows 8? Change its extension to .zip”

  1. If this doesn’t work (it didn’t for me), another blog says “Make a copy of the ISO file, place it anywhere and then mount it” IT WORKED!


    1. Thank you so so so much! I’ve been at this for HOURS! I tried removing what was in my USB prts, SD card, and the CD in the drive. I deleted files in the registry. I converted to .zip and nothing worked, except this! I’m dying because it actually worked omfggg.


      1. np, happy to help. BTW, it’s a good idea to Google the problem you’re having before deleting registry entries 😉 As a matter of fact, I’d say editing the registry should be one of your last resorts for fixing stuff in Windows.


    2. Yep… renaming extension didn’t work. However, copying to another directory and then opening the new copy worked. Thanks!!


  2. Copying is not a solution. I DO NOT have a sparse file and tried copying anyway. Same problem. I wish you guys would stop saying your solved this problem when you have not. If you don’t understand it, then don’t bother posting and flooding the Internet with useless information.



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