Create Windows 11 ISO Using Rufus for Older Systems

Rufus creates a bootable USB drive that bypasses Microsoft hardware checks like TPM 2.0 and Secure Boot, so you can install Windows 11 on older, unsupported PCs. This free tool modifies the standard installation files while it writes the drive, which lets setup skip the official system requirements.

One limit Rufus cannot bypass: Windows 11 24H2 and later require a CPU that supports SSE4.2 and POPCNT. If your processor lacks them, the install will not work, whatever you set in Rufus.

Before you start, gather these things:

• A USB drive with at least 8GB of space that you can erase completely.
• The official Windows 11 ISO file from Microsoft.
• A valid product key. You still need one to activate Windows once the installation finishes.
• An administrator account on the PC where you run Rufus.

How to use 🪟 Windows 11 on older PCs

A Windows 11 ISO prepared with Rufus lets you run Windows 11 on older PCs by bypassing the strict system checks. During the drive creation, Rufus removes the processor, RAM and TPM requirements, so setup accepts hardware it would normally reject. Strictly speaking, the result is a bootable USB drive rather than a new ISO file.

Requirements to check first:

• Administrator rights. Rufus needs administrator rights to write to the drive. When you open it, a User Account Control (UAC) prompt appears. Click Yes. If you are on a standard account, you will be asked for an administrator password.
• Booting from USB. The PC you install on must boot from the USB drive. You do this with the one-time boot menu key (often F12, F10, Esc or F2, depending on the maker) or by changing the boot order in the UEFI/BIOS settings.
• The right drive type for the PC. A drive made as GPT with UEFI only will not boot on an old PC that has BIOS only. Such a PC needs the drive created with MBR and BIOS (or UEFI-CSM). The settings below use GPT and UEFI, which suits PCs with UEFI firmware. Check which one your target PC has before you create the drive.

After downloading the official Windows 11 ISO, use the link below to download the current stable version of Rufus. The beta is no longer needed.

Index of /downloads (Rufus.ie)

Future versions might differ, so option names and dialogs may not match exactly what you see here.

1. Insert the USB drive you want to use.
2. Open Rufus and accept the UAC prompt. The main Rufus window opens.
3. Check that your USB drive is shown under Device. If you have several drives connected, make sure you pick the right one.
4. Click SELECT, browse to the official Windows 11 ISO file, and open it.

Then adjust the highlighted options in the image below to match your setup:

• Image option: Extended Windows 11 Installation (no TPM/no Secure Boot/8GB – RAM)
• Partition scheme: GPT
• Target system: UEFI (non-CSM)

These settings are for a PC with UEFI firmware. If your old PC is BIOS-only, change Partition scheme to MBR and Target system to BIOS (or UEFI-CSM) instead. Otherwise the PC will not see the drive as bootable.

Rufus erases everything on the selected USB drive, and the next step cannot be undone. Copy any files you want to keep off the drive before you continue. Installing Windows on the target PC can also wipe its disk, depending on the choices you make in setup. Back up that PC’s files to another drive or to cloud storage before you install.

Warning: unsupported hardware has risks. Microsoft does not guarantee that updates will be offered to PCs that don’t meet the requirements. Without TPM and Secure Boot, you also lose protections that Windows 11 is designed around, so the system is less secure. Features such as BitLocker device encryption may not work. Only go ahead if you accept these trade-offs.

1. Click START. Rufus now shows a Windows User Experience dialog. The exact wording can change between Rufus versions.
2. Look at the checkboxes. These are the options you will normally see:

   • A checkbox to remove the requirement for 4GB+ RAM, Secure Boot and TPM 2.0. It is normally already ticked when you chose the extended image option. Leave it ticked for an unsupported PC.
   • A checkbox to remove the requirement for an online Microsoft account, so you can finish setup without signing in to one.
   • A checkbox to create a local account with a user name you type in.
   • A checkbox to disable data collection by skipping the privacy questions.
3. Tick the options you want, then click OK.
4. Read the warning that says all data on the device will be destroyed. If the drive is the correct one and holds nothing you need, click OK to confirm.

Rufus now writes the files, and the progress bar at the bottom fills up. Allow the creation process to complete fully, which can take several minutes depending on the drive speed. When the status bar shows READY, the drive is finished. Close Rufus and eject the USB drive safely.

To install, plug the drive into the target PC and boot from it using the boot menu key or UEFI settings, as described earlier. If the PC ignores the drive, go back and check the partition scheme and target system settings.

That completes the process.

Conclusion:

• Creating a Windows 11 USB drive for unsupported hardware lets you bypass the standard installation requirements, apart from the SSE4.2 and POPCNT CPU requirement of 24H2 and later.
• Make sure you have a valid product key or activation for Windows 11 to comply with usage terms.
• Rufus modifies the installation files as it writes the drive, so you don’t need to edit the ISO yourself.
• Always download the latest stable version of Rufus and the Windows 11 ISO for the best compatibility.
• Follow the Rufus settings carefully and match them to your PC’s firmware (UEFI or BIOS) to avoid boot and installation problems.
• Back up your data first, because both the USB drive and the target PC’s disk can be erased.

By following these steps, you can install Windows 11 on your unsupported hardware. Keep in mind that updates and some security features are not guaranteed on such a PC.