Hello, Aron Gaspar
Welcome to the Microsoft Community!
Thank you for your feedback. I read the information you provided. You mentioned that your preview window is not displaying. I noticed that you have tried a few things but the problem persists, which is really frustrating.
Don't worry, you can also try the following methods that will also help you with your current problem.
- Enable Taskbar Thumbnails in System Advanced Settings
Press "Win + X" to open Windows shortcut menu.
Click "System".
On the System > About page, click the Advanced System Settings link.
The "System Properties" box will open
On the Advanced tab, find Performance and click Settings.
In the Visual Effects tab, find the following settings:
Save taskbar thumbnail preview
Show thumbnails instead of icons
Make sure they are turned on, click Apply, and then click OK to save the changes.
- Use Group Policy Editor to turn on Taskbar Thumbnail Preview (if you have a professional version of windows 11 installed)
Go to "Start Menu" and type "gpedit.msc" and click "Enter".
In the Local Group Policy Editor, navigate to "User Configuration > Administrative Templates > Start Menu and Taskbar".
On the "Standard" tab that appears at the bottom of the interface, find "Turn off taskbar thumbnails" and double-click it.
Make sure this option is not enabled
- Finally, I noticed that "Taskbar Window Preview applies to all local accounts on the device, but not to the primary account I use".
You can also try to create a new local account and then transfer your current account configuration data to the new account. For how to create a new local account and how to transfer account configuration data, you can refer to the link below.
Fix a corrupted user profile in Windows - Microsoft Support
I hope this information has been helpful. If you have any questions, please let me know and I will be happy to assist you further.
Best regards
Brian - Microsoft Community Support Specialist