Thank you for providing such detailed information and for documenting the extensive troubleshooting you've already completed.
The fact that Windows Search works correctly in a newly created user account is a very important clue. It suggests that the Windows Search service, indexing engine and underlying Windows components are functioning correctly, and that the issue is isolated to the affected user profile.
Since you've already performed the commonly recommended Search reset and regeneration procedures, I would focus next on determining whether something within the profile environment is interfering with the Search interface.
As a next step, please try starting Windows in Safe Mode with Networking and then test Windows Search while signed in to the affected account:
- Hold Shift while selecting Restart from the Start menu.
- Go to Troubleshoot > Advanced options > Startup Settings > Restart.
- Press 5 or F5 for Safe Mode with Networking.
- Sign in to the affected profile and check whether Search results display text normally.
If the text appears correctly in Safe Mode, that would suggest that a non-Microsoft service, startup application or customization utility loaded during a normal startup may be affecting the Search UI.
In that case, you could perform a Clean Boot to help identify the cause:
- Press Windows + R, type msconfig and press Enter.
- On the Services tab, select Hide all Microsoft services, then click Disable all.
- Open Task Manager > Startup apps and disable all startup items.
- Restart the PC and test Windows Search again.
*Disclaimer: A "clean boot" starts Windows with a minimal set of drivers and startup programs. It helps to determine whether a background service is interfering with your game or program and to isolate the cause of a problem.
These steps of "clean boot" might look complicated at first glance. However, to avoid any trouble for you, please follow them in order and step-by-step so that it will help you get back on track.
I would also be interested to know whether you have any UI customization software installed, custom themes, font replacement utilities or similar tools, as these can occasionally affect Start Menu and Search rendering.
I hope this helps point you in the right direction. Please keep me updated on the results of the Safe Mode and Clean Boot tests, I'll be happy to review them with you.
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