I have sent an email to Mr Satya Nadella (Microsoft CEO) and I got a reply from Dimitar P. (Executive Customer Relations - Customer Service & Support (CSS) ) with the following solution, so I gave Windows 11 a second chance and reload it back to my PC from my Backup image.

So far after applying all the steps sent to my by Mr Dimitar P.  File explorer on my PC is working without any issues.

Here are the steps:

Clear File Explorer Cache:

Open RUN box

In the text field of the dialogue box, type the command mentioned below and hit Enter.

C:\Users\%username%\AppData\Roaming\Microsoft\Windows\Recent\AutomaticDestinations

Once you are in the AutomaticDestinations folder, delete all its contents

 

 

Disable and Enable Search Indexing:

Launch Command Prompt as an administrator

Execute the following command to disable Search Indexing.

sc stop “wsearch” && sc config “wsearch” start=disabled

Execute the following command to enable Search Indexing

sc config “wsearch” start=delayed-auto && sc start “wsearch”

 

 

Rebuild Search index:

Search out “Indexing Options” from the Start Menu.

Click Advanced.

Now, click Rebuild. You will be asked to confirm your action, so, click Ok.

 

 

Run the commands:

DISM /Online /Cleanup-Image /RestoreHealth

DISM /online /cleanup-image /startcomponentcleanup /resetbase

DISM /online /cleanup-image /startcomponentcleanup

Chkdsk c: /f /r /x

 

Be aware that all the steps mention here will erase all your Pinned folders/files and all your folders view settings.


Quelle: https://answers.microsoft.com/en-us/windows/forum/all/windows-11-file-explorer-is-slow-lagging-hangs/30bc56ce-9a59-42ef-8fda-3b2fee603397?page=2