Run Windows 11 on i5 4th Gen: Step-by-Step Guide

October 12, 2026    how-to-guides   

Yes, you can run Windows 11 on a 4th-generation Intel Core i5 (Haswell) PC, but Microsoft doesn't officially support it. Chips like the i5-4460, i5-4590 and i5-4300U are not on the supported CPU list, and most boards from that era lack TPM 2.0. The installer blocks you unless you bypass the checks with Rufus or a registry edit. The shorthand to remember: Fast enough hardware + blocked by policy = bypass, with eyes open.

It works well in practice with an SSD and 8 GB of RAM. The trade-off is that Microsoft may limit updates on your machine.

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Why Windows 11 Rejects Your i5 4th Gen

Windows 11 checks several things, and Haswell machines usually fail two of them. The hardware is fast enough. The blocks come from policy and firmware, not raw capability.

Requirement	i5 4th gen status	What it means
64-bit CPU, 1 GHz, 2+ cores	Passes	No problem
SSE4.2 / POPCNT	Passes	Needed by newer Windows 11 builds; Haswell supports both
Supported CPU list	Fails	The official list starts at 8th gen
TPM 2.0, Secure Boot, UEFI	Often missing or disabled	Check the BIOS for Intel PTT (firmware TPM)
4 GB RAM, 64 GB storage	Usually fine	8 GB is the practical minimum
DirectX 12 / WDDM 2.x	Generally works	Intel HD 4600 drivers arrive via Windows Update

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Before You Start: The Checklist

1. Back up everything. A clean install erases your data.
2. Update your BIOS/UEFI from the motherboard or laptop vendor's website. Some boards expose Intel PTT or Secure Boot after an update.
3. Check the BIOS for TPM/PTT and Secure Boot. Enable them if you find them. If not, the bypass methods below still work.
4. Prefer UEFI/GPT boot over Legacy for Windows 11.
5. Get a 16 GB+ USB 3.0 flash drive.
6. Download the Windows 11 ISO from Microsoft's website only. Pre-cracked or "lite" ISOs from forums are a common malware vector.

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Method 1: Clean Install with Rufus (Recommended)

This is the easiest and most reliable method for Haswell PCs.

1. Download the multi-edition Windows 11 ISO from Microsoft's official download page.
2. Download Rufus from its official site (rufus.ie).
3. Insert your USB drive and open Rufus.
4. Click SELECT and choose the Windows 11 ISO.
5. Click START. A "Windows User Experience" dialog appears.
6. Tick "Remove requirement for 4GB+ RAM, Secure Boot and TPM 2.0". Optionally tick the option to skip the online Microsoft account.
7. Wait for the USB drive to finish writing.
8. Restart, open your boot menu (usually F12, F10, Esc or F2), and boot from the USB drive.
9. Install Windows 11 as usual.

Pros: clean system, no leftover Windows 10 clutter, best performance. Cons: erases your drive.

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Method 2: In-Place Upgrade from Windows 10 (Keep Your Files)

Microsoft documents a registry key for upgrading on unsupported CPUs. It still expects at least TPM 1.2, so it may not work on every desktop board.

1. Press Win + R, type regedit, and press Enter.
2. Go to HKEY_LOCAL_MACHINE\SYSTEM\Setup\MoSetup
3. Create a new DWORD (32-bit) value named AllowUpgradesWithUnsupportedTPMOrCPU.
4. Set its value to 1.
5. Mount the Windows 11 ISO and run setup.exe.
6. Accept the on-screen warning that your PC isn't supported and continue.

Tip: If it still blocks you, use Method 1. It is more dependable.

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Method 3: LabConfig Registry Bypass During Setup

Use this if you're already at the installer screen showing "This PC can't run Windows 11".

1. Press Shift + F10 to open Command Prompt.
2. Type regedit and press Enter.
3. Go to HKEY_LOCAL_MACHINE\SYSTEM\Setup
4. Create a new key called LabConfig.
5. Inside it, create DWORD values set to 1: BypassTPMCheck, BypassSecureBootCheck and BypassRAMCheck.
6. Close the editor, go back one step in the installer, and continue.

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After Installation: Make It Run Well

An i5 4th gen on a spinning hard drive is a miserable experience with Windows 11. These changes matter most:

Upgrade	What it does	Why it matters
SSD	Replaces the hard drive with a 2.5" SATA SSD (256 GB to 500 GB)	The single biggest speed-up. Check SATA SSDs on Amazon
8 GB+ RAM	Haswell uses DDR3 (desktops) or DDR3L (many laptops)	Check your exact model first. Check DDR3/DDR3L RAM on Amazon
Drivers	Run Windows Update first, then the manufacturer's chipset and audio drivers	Fixes missing sound, Wi-Fi and display issues
Startup apps	Task Manager, then Startup apps	Faster boot, lower background load
Visual effects	Settings, Accessibility, Visual effects	Smoother feel on older integrated graphics

Security tip: Keep Windows Security on. Unsupported hardware is no excuse to run unprotected.

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The Risks Nobody Mentions

1. Updates aren't guaranteed

Microsoft's position is that unsupported PCs may not receive updates, including security updates. Many bypassed machines have kept receiving them, but that can change at any time.

2. A watermark or notice may appear

Windows can show a message in Settings, and sometimes on the desktop, that your hardware doesn't meet requirements.

3. Feature updates can fail

Major annual updates may require you to repeat the bypass or reinstall.

4. Fewer security features

Without TPM, features like Windows Hello with TPM or certain game anti-cheat systems may not work.

5. Support is on you

Microsoft and your PC manufacturer won't help with problems on unsupported configurations.

If that makes you uneasy, you have three alternatives: stay on Windows 10 with Microsoft's Extended Security Updates if you're enrolled (check Microsoft's site for the current end date), switch to a lightweight Linux distribution such as Linux Mint, or budget for a used office PC with an 8th-gen or newer CPU.

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Licensing: Stay Legal

1. Windows 11 is a free upgrade only for eligible Windows 10 licenses. A valid Windows 10 digital license generally carries over.
2. Avoid $5 to $10 "lifetime keys." They are often volume-license or OEM keys resold against their terms and can be deactivated without warning.
3. Don't use cracks or "KMS activators." They violate Microsoft's license terms and frequently bundle malware.
4. Buy a legitimate license from Microsoft or an authorized reseller for long-term use. Windows can run unactivated with limited personalization.

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Frequently Asked Questions (FAQ)

Can an i5-4570 run Windows 11?

Yes, with the bypass methods above. It isn't officially supported.

Will Windows 11 be slower than Windows 10 on this CPU?

On an SSD with 8 GB of RAM, the difference is small. On a hard drive, both feel slow, and Windows 11 feels worse.

Do I need TPM 2.0?

Not with a bypass. The requirement is only enforced by the setup checks.

Is it safe?

Reasonably safe if you download only official files, keep Windows Security on, and accept that update support isn't guaranteed.

Can I go back to Windows 10?

After an in-place upgrade, Windows offers a rollback for a limited window, typically 10 days. After a clean install, you restore from your backup.

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Conclusion

Running Windows 11 on an i5 4th generation PC is absolutely possible, and with an SSD and 8 GB of RAM it can feel surprisingly smooth. Go in knowing it's unsupported, back up first, and use only official downloads. Tell us your exact CPU model in the comments and we'll help you choose between an upgrade, Linux, or a newer machine.

Focus Keywords / Tags: run Windows 11 on i5 4th gen, Windows 11 unsupported hardware, Rufus, bypass TPM 2.0, Haswell, Windows 11 SSD upgrade, TechFixGrid

Bypassing Windows 11 system requirements is unsupported by Microsoft. Follow this guide at your own risk and back up your data first. Windows is a trademark of Microsoft Corporation. Intel and Core are trademarks of Intel Corporation. Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates. TechFixGrid is not affiliated with or endorsed by these companies.