One of the great features in Windows 8 is built-in support to mount ISO image files in File Explorer. You still have the option of installing a 3rd party app to handle ISO mounting if you wish (such as Virtual CloneDrive) but Windows can handle it just fine. Mounting an ISO image is easy, just right-click and choose Mount. Windows will mount the image and list it as a drive letter in File Explorer.
But the other day I ran into a problem. After installing my favorite disc image creation software, 
The cause of my problem was due to the file association changes ImgBurn made when I installed it. The .ISO file format was associated to ImgBurn. ISO must always be associated to the File Explorer app in Windows 8 in order for the Mount option to appear in the context menu.
Fixing this problem is easy. Simply change the file association for the .ISO file format back to the File Explorer application.
- Right-click the .ISO file, choose Properties.
- Click the Change button.
- Choose Windows Explorer from the application list.
- The Opens With option will change back to Windows Explorer.
- Click Apply, then OK to close the properties window.
- Now, right-click the ISO file and Mount will be one of the top options
If you find a faster way to fix this problem, I’d be happy to hear about it. As always, please leave a comment if you have any feedback to offer on this post.
-Joe