Windows 11 performance issue

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Windows 11 performance issue

Shovon 0

I have ryzen 5 3400g paired with 128 Sata SSD, 2Tb of HDD and 16 gb of ram. I have been using this build for more than 5 years. I was happy with Windows 10. But the security update time has ended at October 2025. So I updated my device to windows 11. It looks good. But the main issue is I am getting very slower pc. I dunno the reason. I have updated the windows and also the drivers. Set the mood to the "Performance" . But still my pc is very slow. Please help me. What can I do??

Moved from: Sysinternals

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Answer 1

Lucus-V 7,650 Microsoft External Staff Moderator

Hi Shovon,
Welcome to Microsoft Q&A forum. I'm happy to help.

Please help me check this setting: Open Core isolation > Memory integrity.

If it is enabled, please disable it then reboot your machine. Disabling Memory integrity should help gaining some performance.

In case it does not help, you should perform a clean install. A clean install is necessary after upgrading from Windows 10 to Windows 11, as it should prevent driver conflicts from old components and ensure full compatibility with Windows 11 requirements (TPM, Secure Boot, etc.).

Before proceeding:

Back up your data to an external drive or cloud storage.
Download the latest Windows installation media from Microsoft’s official site.
Create a bootable USB and perform a clean install.
After installation, sign in with your Microsoft account to re-link your device and activate Windows.

Disclaimer: At this point, we have exhausted all troubleshooting and I recommend that we try to perform a clean install to get your computer back into a working condition. Please ensure that you backup any important data, including Documents, Pictures, Videos, and more.
Windows 11 Clean Installation Process

In case you need guidance on creating installation media, let me know — I can provide detailed steps.

Please note that after installing and signing in, you may have to run Activation troubleshooter to activate your Windows. More information: Reactivating Windows after a hardware change.

If you have any further questions, please feel free to let me know.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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Lucus-V 7,650 Reputation points Microsoft External Staff Moderator

2025-12-01T06:32:36.8033333+00:00

Hi Shovon,
I hope everything is going well on your end. Just wanted to check in and see how things are going for you lately, anything you'd like to share or discuss?
Shovon 0 Reputation points

2025-12-06T10:47:00.7066667+00:00

what is memory integrity? Would you please tell me briefly? The performance has been developed a bit. But still slower than before.
Lucus-V 7,650 Reputation points Microsoft External Staff Moderator

2025-12-07T02:07:03.7166667+00:00
Hi Shovon,

Memory Integrity is a security feature that adds an extra layer of protection to your PC by isolating critical system processes from attacks. It uses virtualization-based security, which means your computer runs additional checks in a secure environment to keep malware out.

Because of these extra security checks:

Your CPU and memory work a little harder.

Some drivers and apps may take longer to load.

On older or less powerful devices, you might notice slight slowdowns or reduced gaming performance.

May I ask when the first time and last time you update your BIOS?
Shovon 0 Reputation points

2025-12-12T20:58:09.5266667+00:00

I never update my BIOS. I just changed the TPM setting to install windows 11.
Lucus-V 7,650 Reputation points Microsoft External Staff Moderator

2025-12-14T00:10:53.39+00:00

Hi Shovon,
Thank you for your information.

Windows 11 is a major upgrade from Windows 10, to ensure optimal performance and avoid lingering issues from the previous configuration and drivers, we strongly recommend performing a clean installation of Windows.

You can do it with my suggestion above.

I hope that this information is helpful to you.

Answer 2

Ivan B 113.3K Independent Advisor

Hi ,

Generally, when you upgrade from Windows 10 to 11, you may experience performance loss in games, with slowdowns occurring. If you use games for gaming, I always recommend a clean install of Windows 11 before upgrading from 10 to 11.

We can try to improve performance. What is your motherboard model, and do you have a dedicated GPU?

Open the command prompt (admin) and run the commands: sfc /scannow and dism /online /cleanup-image /restorehealth. Wait for the process to finish and restart the computer.

Then perform a clean boot and uninstall applications that you do not use.

https://support.microsoft.com/en-us/topic/how-to-execute-a-simple-boot-start-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd

Thanks

Shovon 0 Reputation points

2025-12-06T10:48:37.0733333+00:00

Clean install is necessary? Coz I have a lot of apps installed on my machine. So it will be time consuming to insatall all of these apps.
Ivan B 113.3K Reputation points Independent Advisor

2025-12-06T19:32:06+00:00

Hi ,

It is not necessary, however, it is recommended, especially if you use your PC for gaming. You were able to do what I said in this post to test and reinstall the drivers, which may improve the problem.

Thanks

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