How to Install ISO File on Windows 11

To install or initiate a setup process using an ISO file on Windows 11, the simplest method involves mounting the ISO file directly within the operating system.

Installing an ISO file on Windows 11 typically refers to using a disk image file (ISO) to perform an action, often installing an operating system like Windows 11 itself or accessing its contents as if it were a physical disc. Windows 11 has built-in capabilities to handle ISO files without needing third-party software.

The primary way to utilize an ISO file for installation or setup on Windows 11, such as initiating the Windows 11 setup program contained within a Windows 11 ISO, is by mounting it. Mounting an ISO file makes Windows treat it like a DVD or Blu-ray disc inserted into a drive, creating a "virtual" drive that you can access.

Steps to Mount and Use an ISO File for Setup

Follow these simple steps to mount an ISO file and start a setup program (like the Windows 11 installer) from it:

1. Locate the ISO File: Open File Explorer and navigate to the location where your ISO file is saved.
2. Mount the ISO: Right-click the ISO file and select Mount.
   • This action creates a "virtual" bootable disc drive under "This PC" in File Explorer.
3. Access the Virtual Drive: A new drive letter will appear, representing the mounted ISO. Double-click on it to view the files within.
4. Run the Setup Program: Look for an executable file, usually named setup.exe or autorun.exe. Double-click setup.exe to start Windows 11 setup or the installation process contained within the ISO.

This method is commonly used for performing in-place upgrades or repairs of Windows 11 without creating bootable media.

What Happens When You Mount an ISO?

Mounting an ISO file utilizes Windows 11's native capability to read the disk image format. Instead of burning the image onto a physical disc, Windows creates a temporary virtual drive that emulates a physical optical drive. All the files and folders stored within the ISO image are accessible through this virtual drive, just as they would be from a real DVD or Blu-ray.

This built-in functionality makes it very convenient to access software installers, operating system setup files, or any other content packaged within an ISO file directly from your Windows 11 desktop.