Can an old PC run Windows 11? What decides it

The checks, in the order that matters

Microsoft lists the minimum hardware for Windows 11. Read on 2026-11-03, the page says: a compatible 64-bit processor at 1 GHz or faster with two or more cores, 4 GB of memory, 64 GB of storage, UEFI with Secure Boot capability, TPM version 2.0, a DirectX 12 graphics card with a WDDM 2.0 driver, and a 720p display.

For an old PC, not all checks are equal. Memory and storage can often be upgraded. TPM and Secure Boot are usually settings. The processor is the one you cannot change on most laptops and office desktops.

1. Processor: is the exact model on Microsoft's list?
2. TPM 2.0: present, and switched on?
3. UEFI and Secure Boot: available, and is the PC using them?
4. Disk style: GPT, or the older MBR?
5. Memory and storage: 4 GB and 64 GB?

If your PC still offers the upgrade, Microsoft says you should see an option in Windows Update. That is the quickest test, but it tells you nothing about why a PC fails.

The processor: Intel

Microsoft does not publish a formula. It publishes lists. Its page says the listed processors meet the minimum floor for the supported generations and everything newer. It also says later generations that meet the same principles are considered supported even if not listed, and that the list is updated at each general availability of Windows.

In the Intel list, read on 2026-11-03 (page last updated 2025-10-30), the oldest Core generation named is the 8th: Core i3, i5, i7, i9 and Core m. After that come the 9th to 14th generation and the Core Series 1 chips. I found no 6th or 7th generation Core i3, i5 or i7 in it.

Some older parts are listed anyway. These are the exceptions I could confirm on the page:

• Core X-series 7000X, 9000X and 10000X.
• Celeron 3000, 4000, 5000, 6000 and 7000 series, plus G4000, G5000, G6000, J4000, N4000 and N5000.
• Pentium Gold 4000U, 4000Y, 5000, 6000, 7000 and 8000, and Pentium Silver J5000.
• Several Xeon lines, such as Xeon W-2100 and E-2100.

So a laptop from 2018 with a Core i5 may be fine or may not. It depends on the generation in the model name, not on the year you bought it. A Core i5-8250U is 8th generation. A Core i5-7200U is 7th. Compare the exact model with the list.

The processor: AMD

In the AMD list, read on 2026-11-03 (the page shows a last update of 2023-07-25), the oldest Ryzen desktop chips are the 2000 series, for example the Ryzen 5 2600 and Ryzen 7 2700 families and the Ryzen 3 2300X. The 3000 series and newer follow. Athlon 3000G, 300GE and 300U are in it too.

I did not find any Ryzen 1000 series chip, such as a Ryzen 7 1700, in the list. I also did not find the Ryzen 5 2500U or Ryzen 7 2700U laptop chips, or the Ryzen 3 2200G and Ryzen 5 2400G. Search the page for your exact model instead of assuming a whole series is in or out.

Because the AMD page has not been updated since 2023, a newer chip may be missing from it. Microsoft's own advice on both pages is to contact the hardware vendor for specific support details.

TPM: often present, often off

TPM 2.0 is required. Many PCs from the last years of the 2010s contain a firmware TPM. Intel calls it PTT (Platform Trust Technology). AMD calls it fTPM. It lives in the processor and firmware, not on a separate chip.

Microsoft's TPM page says some capable PCs are not set up to use it, and that retail motherboards for people building their own PC ship with TPM turned off by default even though it is almost always available to be enabled. It also says the setting may be labelled Security Device, Security Device Support, TPM State, AMD fTPM switch, AMD PSP fTPM, Intel PTT or Intel Platform Trust Technology, often under Advanced, Security or Trusted Computing.

1. Press Windows key + R, type tpm.msc and press OK.
2. Under TPM Manufacturer Information, read the Specification Version. It must be 2.0.
3. If it says a compatible TPM cannot be found, the TPM may only be disabled. Enable it in the firmware settings first.
4. If the version is below 2.0, Microsoft says the device does not meet the Windows 11 requirements.

On Windows 10, Microsoft's page opens the firmware settings from Settings, Update & Security, Recovery, Restart now, then Troubleshoot, Advanced options, UEFI Firmware Settings. Menu names differ by maker.

UEFI, Secure Boot and the disk style

Windows 11 needs UEFI firmware that is Secure Boot capable. Many PCs from 2018 or earlier can do UEFI but run in the older legacy mode, often because Windows was installed that way. Secure Boot only works in UEFI mode.

That is where the disk style comes in. A disk set up for legacy boot is usually MBR. A UEFI system disk is GPT. Microsoft's MBR2GPT tool converts a system disk from MBR to GPT without deleting data, and can run from inside Windows with its /allowFullOS option. After the conversion, the firmware must be switched to UEFI mode, and Microsoft says the change cannot be undone. Run its /validate check first, suspend BitLocker if it is on, and take a full backup before you touch anything.

To see your disk style, open Disk Management, right-click the disk number, choose Properties and look at Partition style on the Volumes tab. This conversion is the riskiest step in this guide. If the PC holds data nobody has backed up, stop and back up first.

Age of PC: a rough guide

Age is a hint, not a test. These rows combine what Microsoft's lists show with the usual pattern. Always confirm with the exact model.

Some makers sold 2018 PCs that still used older chips, and some small Pentium and Celeron models are listed. That is why the exact model matters more than the year.

What Microsoft says about PCs that do not qualify

Microsoft's support page, updated 2024-12-12, is direct. Installing Windows 11 on a device that does not meet the minimum requirements isn't recommended. Such devices might malfunction, are not guaranteed to receive updates, including security updates, and won't receive support from Microsoft. Damage due to lack of compatibility isn't covered under the manufacturer warranty. A watermark is added to the desktop. Microsoft recommends going back to Windows 10, and the Go back option is available for 10 days after an upgrade.

This guide does not describe ways around the checks. If the processor is not supported, the safe options are the next section.

If it will not run Windows 11: three options

Windows 10 reached end of support on October 14, 2025. Microsoft says those PCs continue to function but no longer receive software and feature updates, security updates or technical support.

• Extended Security Updates (ESU) as a bridge. For individuals on Windows 10 version 22H2, Microsoft says enrollment is available through a tool in Settings and updates continue through October 12, 2027. The options are free if you sync PC settings, 1,000 Microsoft Rewards points, or a one-time purchase of $30 USD plus tax. This excludes devices managed by an organization or enrolled in enterprise licensing. Businesses use a separate commercial program; see Microsoft's Learn page.
• Buy a new PC. Microsoft also lists trade-in and recycling for the old device.
• Fix what is fixable first. If only TPM or Secure Boot fails, a setting change may be enough.

ESU is a bridge, not a fix. It gives security updates and no new features, so plan the replacement date while you use it. For a single PC the checks above take ten minutes. For ten or fifty PCs, a fleet checker that reads each machine and builds one report saves the repeat work.

Questions

Keep reading

More guides

About Readylook

Readylook is our Windows app that checks whether the PCs on your network are ready for Windows 11 and builds one report. It only reads: nothing is installed on the PCs it scans, and no data is sent to us. The report is a guide, not a guarantee. It is not in the Microsoft Store yet.

Sources

• Windows 11 requirements (Microsoft Learn, page dated 2026-07-14)
• Windows 11 supported Intel processors (Microsoft Learn)
• Windows 11 supported AMD processors (Microsoft Learn)
• Enable TPM 2.0 on your PC (Microsoft Support)
• Installing Windows 11 on devices that don't meet minimum system requirements (Microsoft Support, updated 2024-12-12)
• End of support for Windows 10 (Microsoft)

Checked 2026-11-03.