Obtaining the ISO from official channels has become more difficult as Microsoft prioritizes newer versions.

Once you've downloaded the Windows 8.1 ISO file, you'll need to create a bootable USB drive to install the operating system. You can use tools like:

However, because the operating system is older, the download process is slightly less straightforward than it is for modern Windows versions. Here is a guide on how to find, download, and use a Windows 8.1 ISO safely.