eureka!
we are close to the diagnosis thanks to you.
Answering your first question, when I paste %appdata% into the run dialog, it sends me to C:\Users\HP\AppData\Roaming
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When entering the Event Viewer and running the designer application, it showed me several errors. I attach the images.
I also attach an appCrash report of the results of the event viewer through the link that you will see in one of the attached images
(\\?\C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_Designer.exe_7c1b48fbb934587831fc5d8ff296d1af829ec3_b29a52f7_ce61ffdc-67b6-42d3-baee-fe2605e88c8a)
While you check what I send, I will execute the last suggestion regarding creating a new user,
I will inform you
report app crash designer.txt