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Stonety's avatar
Stonety
Brass Contributor
Jun 01, 2026

Windows 11 compatibility checker to know my computer compatible with Windows 11?

Thinking about upgrading my Windows 10 PC upgraded to Windows 11 but not sure if the current Windows 10 machine actually meets the requirements.  Done a bit of reading and it seems like Windows 11 h...
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CameronWalker's avatar
CameronWalker
Iron Contributor
Jun 01, 2026

WhyNotWin11, a free, open-source Windows 11 compatibility checker developed by Robert C. Maehl. It gives you more detailed and accurate information about why your PC may not be eligible for Windows 11 rather than just a vague pass/fail result.

How to Use Free Windows Compatibility Checker

Step 1: Download it

Download WhyNotWin11 from GitHub. Scroll down to the "Downloads" section and click "Download latest stable release." 

Step 2: Run it

Double-click the "WhyNotWin11" executable to run the application. No installation is needed — it's a standalone file. If Windows Defender or your antivirus flags it, you may need to allow it through, as it's a lesser-known app from GitHub. 

Step 3: Review the results

After a few seconds, WhyNotWin11 will list all the key Windows 11 requirements alongside whether your PC meets them. You don't need to manually enter any information or perform a setup process. 

Understanding the Color Results

The results are color-coded:

Green — Compatible component

Orange — Borderline or requires attention

Red — Incompatible component

You can hover over the information icons next to each criterion for additional details. So it is my favorite 

Windows 11 compatibility checker checker tool.