Hi Minnah Raouf,
I am Dave, I will help you with this.
1
In File Explorer, on the view menu, temporarily turn on 'Hidden Items'
Navigate to this folder: C:\Users\Public\Public Desktop
Are any of the files you want to delete located in that folder?
2
Right click each f those Desktop folders, select Properties, what is the exact reported location of each of those Desktop folders?
3
Click your Start Button, type regedit and hit Enter to open the Registry Editor.
Click View and make sure 'Address Bar' is turned on.
Paste this into the Address Bar at the top and hit Enter.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
Please provide a screenshot of that Registry Editor page.