Is this legal? (Windows 11 GUI Customisation to create Aero)

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Is this legal? (Windows 11 GUI Customisation to create Aero)

Ash Kanyanta 40

Hi,

I'm trying to customise my windows 11 computer so it looks more like Windows 7, with the Aero Glass interface look. I'm not redistrubuting any software changes I make, and i'm also not exactly doing it myself, just with the help of tools such as Windhawk, Retrobar, ClassicShell (now OpenShell) DWMBlurGlass etc. I am not trying to break the Windows EULA, as I understand it is proprietary code but pretty much all I wanna do is recreate a look.

Is this legal to do?

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Answer 1

Ivan B 111.3K Independent Advisor

Hi,

Yes, it's legal. In this case, everything is fine as long as you're not breaking the EULA by making modifications using third-party software, provided it's not related to the closed-source code of Windows itself.

Here's an explanation: https://support.microsoft.com/en-us/office/microsoft-software-license-terms-5476247d-05e5-4ac7-b77c-1b8cd229e91a#:~:text=Third%20Party%20Software.,extent%20allowed%20by%20applicable%20law.

It's like using malicious software to illegally activate native Microsoft software.

In your case, the problem would be a security issue. You have to be careful when using software that modifies Windows, as this can cause your PC to stop working or corrupt Windows because it can modify the registry and system files.

You can check in the Microsoft Store that there are customization software that have been verified and are safer because the software is verified.

https://www.microsoft.com/en-us/servicesagreement#:~:text=The%20Third%2DParty%20Apps%20and,Third%2DParty%20Apps%20and%20Services.

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Thanks

Ash Kanyanta 40 Reputation points

2026-04-11T16:29:58.5466667+00:00

Thanks for your answer. Would this generally classify as breaking EULA? Because I'm using these applications as listed to change the interface of windows. Again, only my PC. What I'm changing is the taskbar, the Start Menu, the look and feel of open applications, however not modifying applications themselves, only how it is presented to give more of a 2000s windows look.

I just want to know if, in my case, what I am doing is legal and okay to continue.I fully understand, that if my device experiences problems as a result thereof, it's my full responsibility and Microsoft is 0% liable for that.
Ivan B 111.3K Reputation points Independent Advisor

2026-04-11T16:38:41.4166667+00:00

Hi,

As you mentioned, this isn't breaking the EULA, it's legal. However, Microsoft doesn't support third-party software, and there's a risk that third-party software could modify Windows files and the registry, corrupting the system and preventing the OS from malfunctioning and causing bugs.

It's fine that you're not breaking the EULA in this case, but I must inform you that regarding system security and usage, and at your own risk, Microsoft doesn't support this third-party software. There are risks of Windows corruption, bugs, and other issues.

If you recognize the answer, you can confirm or not.

Thanks
Ivan B 111.3K Reputation points Independent Advisor

2026-04-13T11:48:27.54+00:00

Hi ,

Did you manage to solve the problem?

Thanks
Ash Kanyanta 40 Reputation points

2026-04-13T15:18:26.5933333+00:00

Yes, thank you very much for your answer! It's looking good and I'd say it worked out well. Hope all is well with you.

Kind regards.

Answer 2

Bulldog 1,935

Is it legal? Yes.

It's not a crime to install legal software.

Is it supported by Microsoft? No.

That means if you have any problems from the software, you can't look to Microsoft for a solution.

I am in a similar situation with the third-party Start menu replacement I purchased (and love.)

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Is this legal? (Windows 11 GUI Customisation to create Aero)

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