Did you open a admin terminal and then cd to the folder which contains the installation script and other files? Don't just right click the script and run as administrator.
Server SKUs require special treatment so this method won't work. Since that's not my interest I won't talk more about it.
I want to install Windows Security, Microsoft Store, Settings and other apps. Is there another way to do this as I can't get anything done so. I was able to mount the install.wim but the command steps is where I'm having errors. I guess I'm not doing something right with the command. However, windows update is not even updating those apps.. is just like I'm only on the user interface with only Explorer, and browser working. Anyone with a valuable information on how to fix those aforementioned issue, I will be very grateful. Thanks in advance.
Unrar the archive to wherever you want. Inside of folder you will see a file called "install_script". Just right click it and run as administrator. A window will pop up asking for path to mounted .wim. Just put path in and click enter and all apps will install.