I try to mount a .iso and get the following eror on windows Server 2012
"sorry, there was a problem mounting the file."
It seems like it works fine if I mount it not through mapping drive.
The error message is not very clear so here are some tips on debugging the issue. Open up a Powershell command prompt and type the following (from here) :
Next type the following command to mount your image. Change the "ImagePath" parameter with the path to your ISO:
The "-verbose" flag should give you some info but type the following command immediately after executing the above might give you more debug info:
Paste the error message back here if it gets you nowhere and see if someone can help :)
If you downloaded the iso from Microsoft using their Akamai NetSession client then this is actually a bug in the downloader.
When you right click and try to mount, you will get this error:
The problem is that their required download manager is setting the download file to be a sparse file as can be seen by the "P" attribute in the screenshot below.
The easiest way to fix this is to copy the file so that the sparse attribute is gone. Normally if you copy using Windows Explorer the sparse attribute will be removed.
Credit for this info goes to : Bug of the Day: Couldn't Mount File in Windows 8.1