If you are unsure of your system type, right-click "This PC" on an existing Windows installation and select "Properties." Look for "System type."
Microsoft officially ended extended support for Windows 8.1 on January 10, 2023 .
When downloading, you will typically see options for and Windows 8.1 Pro . download windows 8.1 disc image -iso file- - microsoft
Note: The generated download links utilize secure tokens and remain valid for exactly 24 hours from the time of creation. Preparing the Installation Media
You will need a valid 25-character Windows 8.1 product key to install and activate the software. Microsoft Learn Step 1: Download the ISO File from Microsoft Go to the official Microsoft Software Download page and select Windows 8.1 from the list of available operating systems. Scroll down to the Select edition dropdown menu. If you are unsure of your system type,
Choose for modern UEFI computers, or MBR if you are flashing media for older legacy BIOS computers. Click Start and wait for the tool to finish flashing. Installing Windows 8.1
Even with the official tools, you might encounter some problems. Here are solutions to a few common issues. Preparing the Installation Media You will need a
For , select GPT if you are installing on a modern system with UEFI firmware, or MBR if you are installing on an older machine with a traditional BIOS. Leave all other settings at their defaults and click Start .