Wondering why Windows 11 won't install on your computer? We explain Windows 11 system requirements and what to do if your PC isn't compatible.
Windows 11 Compatibility: Why Your PC May Not Qualify
Many of our Inverness customers ask why their perfectly good PC won't run Windows 11. Here's the complete explanation and your options.
The Main Culprits: TPM 2.0 and Secure Boot
The two most common reasons PCs fail Windows 11 compatibility checks are:
1. TPM 2.0 (Trusted Platform Module)
Windows 11 requires TPM 2.0 for security. Many older PCs have TPM 1.2 or no TPM at all.
How to check:
- Press Windows + R
- Type
tpm.mscand press Enter - Check the TPM version listed
2. Secure Boot
Your PC must support UEFI firmware with Secure Boot capability. Older PCs use Legacy BIOS instead.
Complete Windows 11 Requirements
| Component | Requirement |
|---|---|
| Processor | 1 GHz, 2+ cores, 64-bit compatible CPU |
| RAM | 4 GB minimum |
| Storage | 64 GB minimum |
| System Firmware | UEFI, Secure Boot capable |
| TPM | Version 2.0 |
| Graphics | DirectX 12, WDDM 2.0 |
| Display | 720p, 9" diagonal minimum |
Check Your PC Compatibility
- Download Microsoft's PC Health Check app
- Run the application
- Click "Check now" under Windows 11
- Review the detailed results
Solutions If Your PC Isn't Compatible
Option 1: Enable TPM in BIOS
Some PCs have TPM 2.0 but it's disabled:
- Restart and enter BIOS (usually F2, F10, or Del)
- Look for Security or Advanced settings
- Find TPM or PTT (Intel) / fTPM (AMD)
- Enable it and save changes
Option 2: Hardware Upgrade
For newer PCs (2016+), we may be able to add a TPM module to your motherboard.
Option 3: Stay on Windows 10
Windows 10 receives support until October 2025. You have time to plan an upgrade.
Option 4: New PC
If your PC is 7+ years old, a new computer might be more cost-effective than upgrading.
Unofficial Workarounds (Not Recommended)
While bypass methods exist, we don't recommend them because:
- You won't receive all security updates
- Some features may not work
- Microsoft may block updates in future
- No official support available
Need Expert Advice?
Ness PC in Inverness can check your computer's compatibility, enable TPM if possible, or advise on the best upgrade path for your needs and budget.
We'll help you make an informed decision - whether that's enabling hidden features, upgrading components, or choosing a new system.
