Building your first DIY PC can be an exciting experience, and installing Windows 11 is a crucial step to start using your new machine. In 2026, the process remains similar to previous years, but with some updates to hardware compatibility and installation procedures. This guide will walk you through the steps to install Windows 11 on your custom-built PC.

Prerequisites for Installing Windows 11

  • A compatible PC with the required hardware specifications
  • A Windows 11 installation media (USB drive or DVD)
  • Product key for Windows 11 (if applicable)
  • Backup of any important data

Ensure your hardware meets the minimum requirements for Windows 11, including a compatible 64-bit processor, 4GB of RAM, 64GB storage, UEFI firmware with Secure Boot capability, and TPM 2.0 support.

Creating a Bootable Windows 11 USB Drive

Download the Windows 11 ISO file from the official Microsoft website. Use a tool like Rufus or the Windows Media Creation Tool to create a bootable USB drive. Insert a USB stick with at least 8GB of space, select the ISO file, and follow the tool’s instructions to prepare the drive.

Preparing Your PC for Installation

Insert the bootable USB into your new PC. Power it on and enter the BIOS/UEFI settings by pressing the designated key (often F2, F12, DEL, or ESC). Configure the boot order to prioritize the USB drive. Save changes and restart the system.

Installing Windows 11

The Windows Setup will launch automatically. Follow these steps:

  • Select your language, time, and keyboard preferences, then click "Next."
  • Click "Install now."
  • Enter your product key or choose "I don't have a product key" to activate later.
  • Select the edition of Windows 11 you want to install.
  • Choose "Custom: Install Windows only (advanced)" for a clean installation.

Next, select the drive where Windows 11 will be installed. If your drive has existing partitions, delete or format them as needed. Proceed with the installation process.

Completing the Setup

After copying files, your PC will restart several times. Follow the on-screen prompts to set up your preferences, create a user account, and connect to Wi-Fi. You may also be prompted to customize privacy settings.

Final Steps

Once setup is complete, Windows 11 will boot to the desktop. Check for updates by navigating to Settings > Windows Update. Install any available updates to ensure your system is secure and up-to-date.

Your DIY PC is now ready with Windows 11 installed. Enjoy exploring its features and customizing your new system.