Problem after update

In-place upgrade: I have downloaded the ISO, but there is no "Mount" option anywhere

Forgot what it was, but the default app for .iso was not Explorer. Fixed it and ran the upgrade.

Currently in clean boot mode. Now my account displays the same horror as the main one did previously, and the main one is purely black.

Hi EricYL.

Thanks for your reply. I'm sorry to hear that the problem seems to have gotten worse after you tried the in-place upgrade and clean boot.

We have determined that this is most likely a serious file error or missing files on the system and we can only recover by reinstalling the system. Please refer to the following steps

1 Take out your hard disk from your computer and plug it into another computer, make a backup of the data inside, after the backup, format it and plug it back into your computer.

2 Use a USB drive to make a system installation media, plug it into your computer, then boot up your computer, and under the guidance of the motherboard manual or device manufacturer, enter the BIOS setup page, set the system installation media (USB drive) made earlier as the boot device, and reinstall the system in this way.

For details, please refer to the following link

How to: Perform a Custom Installation of Windows 11 and Windows 10 or - Microsoft Community

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.

Thank you for your understanding and support.

Best regards,

Zev - MSFT | Microsoft Community Support Specialist

Hi Zev

Would hate to do this.

No other computer. External drives yes, but to me if some users (like this one) can work normally it cannot be a global problem.

EricYL

Hi EricYL.

Thank you for your reply. I understand that you now have some of your accounts available.

For now we can only fix it by reinstalling Windows, if you would like, please backup your data and then refer to the following link

Windows 11 Clean Installation (microsoft.com)

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.

I understand if you don't want to, after all, the problem hasn't completely disabled you, so to avoid the same problem in subsequent use, which would make data in some accounts inaccessible, please back up your data separately for different accounts.

At the same time, this issue is worth being noticed by the development team, Microsoft attaches great importance to user experience, you can submit your ideas and suggestions through the Feedback Hub, and the development team will regularly review submissions for ideas or fixes.

Please share the feedback link here after submitting as it will allow others on the forum to vote for your submission, including me. More votes will lead to more visibility and higher priority to the development team.

Thank you for your understanding and support.

Best regards,

Zev - MSFT | Microsoft Community Support Specialist