Back to Windows 10 from bad Windows 11

 https://support.lenovo.com/cr/th/solutions/ht512969-how-to-downgrade-from-windows-11-to-windows-10

Downgrade within 10 days

Open Settings.
Select System.
Select the Recovery page on the right side.
Recovery
Under the Recovery options section, in the Previous version of Windows settings, select the Go back button.
Go back
Select an available reason.
Select the Next button.
Select the No, thanks button.
No thanks
Select the Next button.
Select the Next button again.
Select the Go back to earlier build button.
Go back
After the steps are complete, the setup process will revert the system back to the previous version of the operating system.

MORE TIPS in C#:

https://stackoverflow.com/questions/74228434/ubl-2-1-xml-deserialization-c-sharp-list-array

https://github.com/UblSharp/UblSharp

<env:DocumentId>

https://stackoverflow.com/questions/16041628/how-to-generate-a-document-id-or-report-id-of-8-characters-in-net

c#:

using System;

// Generate a new GUID

Guid guid = Guid.NewGuid();

// Display the GUID as a string

Console.WriteLine(guid.ToString());

Lazarus-ide:

https://wiki.freepascal.org/XML_Tutorial

function tiCreateGUIDString: string;

{$IFDEF FPC}

var

  lGUID: TGUID;

{$ENDIF}

begin

{$IFDEF FPC}

  CreateGUID(lGUID);

  Result := GUIDToString(lGUID);

{$ELSE}

  Result := tiWin32CoCreateGUID;

{$ENDIF}

end;      

procedure TForm1.Button1Click(Sender: TObject);

begin

  Showmessage(tiCreateGUIDString);

end;