No need to extract Win8.1 install.wim files

First, check the mirror version:

The mirror contains more than one version, you need to confirm the version you need, my mirror path is "F:win8.1sourcesinstall.wim", then execute the following command

Dism/get-wiminfo/wimfile: "F:win8.1sourcesinstall.wim"

As shown in version 1 is WIN8 Pro version 2 is WINDOWS8 Standard Edition, I am WIN8 Pro Natural Selection 1

Second, decompression Image:

I want to extract the Install.wim file into the c:111 folder and execute the command for this:

Dism/mount-wim/wimfile: "F:win8.1sourcesinstall.wim"/index:1/mountdir:c:111

When the command is complete, open c:111 as shown in the extract, you can choose to copy the required files.

Third, uninstall the Mirror:

After you finish extracting files, you no longer need to uninstall, close the mirrored folder before uninstalling, and then execute the command:

Dism/unmount-wim/mountdir:c:111/discard

When the command is complete, the c:111 becomes an empty folder.