Yes, you can install Windows 11 on an unsupported PC, and Microsoft even documents one way to do it. But Microsoft says unsupported PCs are not guaranteed to get updates, so you trade official support for a newer system. For many older ex-UK laptops, that trade is worth thinking through carefully.
What “unsupported” really means
A PC is unsupported if it misses any of the Windows 11 system requirements. The usual reasons:
- Processor too old: roughly anything before Intel 8th gen or AMD Ryzen 2000. This hits the 4th–7th gen ThinkPads, EliteBooks and Latitudes common in Kenya. Here’s how to check your processor generation.
- No TPM 2.0: older machines often have TPM 1.2 or none.
- No UEFI/Secure Boot: very old machines running in legacy BIOS mode.
Unsupported doesn’t mean it won’t run. Most 6th and 7th gen laptops run Windows 11 smoothly with 8 GB RAM and an SSD.
Microsoft’s documented workaround
Microsoft publishes a registry change for upgrading a Windows 10 PC that has at least TPM 1.2 but an unsupported processor or no TPM 2.0:
- Back up your files first.
- Open Registry Editor (
regedit) and go toHKEY_LOCAL_MACHINE\SYSTEM\Setup\MoSetup. - Create a DWORD (32-bit) value named
AllowUpgradesWithUnsupportedTPMOrCPUand set it to1. - Download the Windows 11 ISO from Microsoft (about 5–6 GB), open it and run
setup.exe. - Accept the warning that the PC isn’t supported.
This only works as an upgrade from Windows 10, and only with TPM 1.2 or newer. Machines with no TPM at all need unofficial tools that strip out the checks. They usually work, but Microsoft doesn’t support them, and you should only download them from their official project pages. For a normal install on supported hardware, follow our Windows 11 install guide.
Risks: updates and stability
- Updates aren’t guaranteed. Microsoft can stop sending updates, including security fixes, to unsupported PCs. So far monthly updates have generally arrived, but big yearly updates sometimes need the workaround again.
- A “system requirements not met” watermark may appear on the desktop and in Settings.
- Drivers: some older devices lack Windows 11 drivers for Wi-Fi, fingerprint readers or webcams.
- Warranty and support: manufacturers won’t help with problems on an unsupported setup.
Alternatives: stay patched another way or replace
| Option | Good for | Downside |
|---|---|---|
| Stay on Windows 10 | Offline or light use only | No more free security updates for home users |
| Linux (e.g. Ubuntu, Mint) | Browsing, Office-type work, school | Some Windows apps and games won’t run |
| ChromeOS Flex | Web-only use, older machines | Limited offline apps |
| Replace with a supported used laptop | Daily work, banking, M-Pesa web use | Costs money |
A newer ex-UK laptop (8th gen or later) often costs less than people expect, and it runs Windows 11 with full update support. If you do banking or business on the machine, that is the safer path.
Quick answers
Yes, via Microsoft’s registry workaround (needs TPM 1.2 or newer) or unofficial tools, but updates aren’t guaranteed.
With TPM 1.2, yes, using Microsoft’s documented registry change. With no TPM at all, only through unofficial tools.
