Can You Install Windows 11 on an Unsupported CPU?

Not in a way Microsoft supports. Windows 11 Setup and Windows Update block the upgrade on a PC whose processor isn’t on Microsoft’s approved list, and Microsoft says a PC upgraded through a workaround won’t be supported and isn’t guaranteed to receive updates.

First run PC Health Check, turn on TPM and Secure Boot if they’re only switched off, and upgrade through Windows Update if the PC then passes. If the processor itself fails, your supported choices are Windows 10 with Extended Security Updates or a PC that meets the requirements.

What “unsupported CPU” means

Windows 11 has a list of minimum system requirements. For the processor (also called the CPU, the chip that does the computer’s main work), Microsoft’s Windows 11 system requirements page asks for 1 GHz or faster, 2 or more cores, a compatible 64-bit design, and a model that appears on Microsoft’s list of approved CPUs. A fast older processor can meet the first three and still fail the fourth.

Microsoft also points out that clock speed and core count are built into the processor and are not upgradable parts. That is why a processor failure is different from the other common failures, which are often just settings.

Requirement	Microsoft’s minimum	Can it usually be fixed?
Processor	1 GHz, 2+ cores, 64-bit, on the approved list	No. It depends on the chip itself
TPM	Trusted Platform Module version 2.0	Often. It may only be turned off
System firmware	UEFI, Secure Boot capable	Often. It may be set to Legacy or CSM mode
RAM	4 GB	Sometimes, by adding memory
Storage	64 GB or larger drive	Sometimes, by replacing the drive
Windows version	Windows 10, version 2004 or later	Yes, by installing Windows 10 updates

Two terms in that table are worth knowing. TPM is a security chip or firmware feature that Windows uses for things like Windows Hello and BitLocker. UEFI is the modern version of the PC BIOS, the software that runs before Windows starts. Secure Boot is a UEFI feature that only lets trusted, signed software load during startup.

Check whether your CPU is the real problem

Many PCs fail the Windows 11 check because TPM or Secure Boot is turned off, not because the processor is too old. Find out which one applies to you before you decide anything. The PC Health Check app is Microsoft’s own tool for this on a Windows 10 PC.

1. On your Windows 10 PC, select the search box on the taskbar and type PC Health Check. Select the app in the results. If it isn’t installed, Microsoft’s PC Health Check page linked above has the download.
2. If the app offers an update for itself, install it so you get the current check.
3. At the top of the window, select Check now.
4. Read the result. The app says whether the PC meets the Windows 11 requirements and, if it doesn’t, lists the reasons.
5. Note every item that fails. A processor result is the one this article is about. A TPM or Secure Boot result can often be fixed, as described in the next section.

Keep two limits in mind. PC Health Check does not test the graphics card or display, because most compatible PCs already meet those. And if your PC is managed by an employer or school, ask the IT administrator instead, because these consumer tools are not meant for managed PCs.

Fix TPM and Secure Boot first

If PC Health Check lists TPM 2.0 or Secure Boot and does not list the processor, the PC may become eligible after a firmware change. Firmware menus differ by manufacturer, so treat the names below as examples and check your PC maker’s support site for the exact steps.

Check and turn on TPM 2.0

1. Press Windows key + R, type tpm.msc, and select OK.
2. If you see a message that the TPM is ready to use, look at Specification Version under TPM Manufacturer Information. It must say 2.0.

3. If you see Compatible TPM cannot be found, the TPM may simply be disabled. In Windows 10, go to Settings > Update & Security > Recovery and select Restart now.
4. Select Troubleshoot > Advanced options > UEFI Firmware Settings > Restart.
5. Look in a menu named Advanced, Security, or Trusted Computing. Microsoft’s TPM 2.0 guide says the setting may be labeled Security Device Support, TPM State, AMD fTPM switch, or Intel PTT, among others. Turn it on, save, and restart.

If the specification version shows less than 2.0, the device does not meet the Windows 11 requirement. There is more detail on enabling TPM in Windows 11 and Windows 10.

Check UEFI and Secure Boot

According to Microsoft’s Secure Boot article, the upgrade requirement is only that the PC is Secure Boot capable, which means it starts in UEFI mode. A PC set to Legacy BIOS mode, sometimes called CSM, can look as if Secure Boot isn’t available. The fix is to make UEFI the first or only boot mode in the same firmware settings screen.

Be careful here. Changing the boot mode on a PC whose drive was set up for Legacy mode can stop Windows from starting until you change the setting back. Back up your files and follow your manufacturer’s instructions before you touch it. The Windows side of the process is covered under enabling Secure Boot.

Firmware setup is also where processor features are switched on, so it’s the place to turn on hardware virtualization in Windows 11 if an app later asks for it.

Run the check again

Open PC Health Check and select Check now again. If the PC passes, Microsoft’s advice is to wait until Windows Update tells you Windows 11 is ready rather than forcing it. Windows Update can take up to 24 hours to refresh its eligibility information after a hardware or firmware change. Once the offer appears, you can update to Windows 11 from Windows 10 the normal way.

What Microsoft says happens on an unsupported install

If the processor is still listed as unsupported, this is the part to read closely before you consider any workaround. Microsoft’s support page on devices that don’t meet minimum system requirements says installing Windows 11 on ineligible hardware isn’t recommended, and that you should be comfortable taking on the risk of compatibility problems.

• No support or guaranteed updates. Microsoft won’t support the PC and doesn’t guarantee updates, including security updates. The setup warning says the PC won’t be entitled to them.
• Possible malfunctions. Compatibility problems can make the PC malfunction, and the setup warning says damage from them isn’t covered by the manufacturer warranty.
• A watermark. Windows 11 adds a desktop watermark, and Settings might show a notice that the requirements aren’t met.

Setup makes you agree to this. When you try to install on a PC that fails the requirements, a disclaimer appears, and selecting Accept means you acknowledge that you have read and understood it.

Why we don’t list a bypass method

You will find registry edits and third-party tools online that are meant to skip the Windows 11 hardware checks. This guide does not walk through them, for two reasons.

• Microsoft does not document one. Its Ways to install Windows 11 page now states that it covers devices that meet the system requirements, and no workaround for unsupported processors appears on it.
• The result is not dependable. A method that works for one release of Windows 11 may not work for the next one, and Microsoft does not promise that future updates will install.

Microsoft’s position is direct. If you installed Windows 11 on a device that doesn’t meet the requirements, it recommends you roll back to Windows 10 immediately.

Supported options if your CPU isn’t on the list

Stay on Windows 10 with Extended Security Updates

Windows 10 support ended on October 14, 2025. Microsoft’s consumer Extended Security Updates (ESU) program keeps critical and important security updates coming to Windows 10, version 22H2. The program is currently set to end on October 12, 2027. ESU does not include new features, other fixes, or technical support.

There are three ways to enroll: at no additional cost if you sync your PC settings, by redeeming 1,000 Microsoft Rewards points, or with a one-time purchase of $30 USD or the local equivalent plus tax. You need to sign in with a Microsoft account that is an administrator on the PC, and one ESU license can be used on up to 10 devices.

1. Install all pending Windows 10 updates and restart.
2. Go to Settings > Update & Security > Windows Update.
3. If the PC meets the prerequisites, a link to enroll in ESU appears. Select Enroll now.

4. Sign in to your Microsoft account if asked, then choose one of the enrollment options.

If you don’t see the link, check that the PC is on version 22H2. Enrollment isn’t offered on PCs joined to a work domain, managed by an organization, or running in kiosk mode.

Move to a PC that meets the requirements

A PC sold with Windows 11 gets full support and updates. That is the route Microsoft’s requirements page points to for anyone whose PC isn’t eligible. When the new PC arrives, moving your data to it is the next step.

On some desktop PCs, a newer processor may fit the existing motherboard. Whether that works depends on the motherboard, its firmware, and the exact processor, so confirm it with the PC or motherboard manufacturer before you buy anything. After a hardware change, run PC Health Check again.

Keep the PC for other uses

The PC doesn’t stop working when support ends. A Windows 10 PC will still run, but without ESU it no longer gets free software updates, technical assistance, or security fixes. That makes it a poor choice for banking, email, or anything else that involves your accounts.

How to go back to Windows 10 after an unsupported install

If Windows 11 is already on an unsupported PC and it is causing problems, the recommended fix is to go back to Windows 10. The Go back option is only available for 10 days after the upgrade. After that, Windows removes the files it needs in order to free up disk space.

Before you start, make sure you know the password you used to sign in to Windows 10. Windows warns you about this during the process, because you could be locked out without it. Back up any files you created since the upgrade.

1. Right-click Start and select Settings.
2. Go to System > Recovery.
3. Under Recovery options, next to Go back, select the Go back button.

4. If a User Account Control window appears, select Yes. You need an account with administrator rights.
5. In the Go back to Windows 10 window, select Next.
6. When asked Check for updates?, select No, thanks.
7. Read What you need to know and select Next.
8. Read Don’t get locked out. If you know your Windows 10 password, select Next. If not, select Cancel and reset the password first.
9. Select Go back to Windows 10. The PC restarts and restores Windows 10.

To confirm it worked, right-click Start, select Run, type winver, and press Enter. The window that opens names the Windows version. Other ways to check are in how to tell if you have Windows 10 or 11. Then enroll in ESU, as described above, so the PC keeps getting security updates.

Troubleshooting

• There is no Go back button. That means going back is no longer possible, usually because the 10 days have passed. Returning to Windows 10 would then need a clean installation, which erases the drive, so back up everything first.
• PC Health Check and Windows Update disagree. Eligibility information in Windows Update can lag behind. Microsoft’s article on checking requirements after a hardware change explains how to refresh it: open Task Scheduler, go to Task Scheduler Library > Microsoft > Windows > Application Experience, right-click Microsoft Compatibility Appraiser, and select Run.
• The PC passes, but Windows 11 isn’t offered. Microsoft rolls the upgrade out over time and may hold it back when a known compatibility issue affects your device. Install pending Windows 10 updates, restart, and check again later.
• Windows Update shows “Get ready for Windows 11.” The hardware requirements link in that message doesn’t test your PC. Use PC Health Check instead.
• There is no UEFI Firmware Settings option. The PC may be starting in Legacy mode or may not have UEFI firmware. Check the manufacturer’s support pages for your exact model.
• There is no TPM setting in the firmware. The PC may not have a TPM. Ask the manufacturer before buying an add-in module.
• The Task Scheduler task won’t run. If you see a message that the user account does not have permission, sign in with an administrator account.

Frequently asked questions

Next step

Run PC Health Check and write down exactly which items fail. If it is only TPM or Secure Boot, fix those and wait for Windows Update to offer the upgrade. If it is the processor, enroll the PC in ESU now so it stays protected while you plan a replacement. Once you have a PC that meets the requirements, you can install Windows 11 on it.