Windows 10: How to prevent a deleted file from re-appearing ?

In a puzzlingly erratic way, a downloaded file that I have repeatedly deleted, keeps re-appearing in a folder. What can be going on, and how can it be prevented ?

:)

 

deleting hard drive files

Hi,

May we know what type of file are you trying to delete? Would it be Office documents, media files, or picture files? If you're trying to delete files for free some space on your device. We suggest to perform a Disc Cleanup. Kindly follow the steps below to
perform the task:

• Type in Cortana Disc Cleanup
  
• Choose the files to delete
  
• Click on "Clean up system files"
  
• Click on Ok
  

For any concerns, don't hesitate to get back to us.

Regards.

 

Preventing access to modern app

Ive been tasked with preventing the children from accessing instagram. I've got it listed in my windows hosts file and internet options/security/restricted site but the windows 10 app is still allowing access. Any suggestions other then deleting app which can just be reinstalled?

 

How to prevent deletion of files in directory?

Using Windows Version 2004 (OS Build 19041.804)

I followed these steps but without success:
1. At the root of a non-system drive create a folder "folder".
2. Inside create a file "file.txt".
3. For folder add permission rule: everyone / deny / delete subfolders and files:



4. Pressing OK brings this warning:



5. For "file.txt" check effective access for current user -- it can delete:



Same happens if, just like with everyone, denial rules in "folder" security are further added for authenticated users and system.
Moreover, if the file owner is changed (to another user, happens to be admin) the current user (not admin) can delete the file. And this is of course reflected in effective access. Finally, trying the most restrictive measure -- adding the denial rule for the current user, regardless of the file owner, current user can still delete the file.
What am I missing? Does the system need restart?
What are the conditions for the contents of a folder to be protected from deletion and with respect to which accounts? Which accounts can / cannot delete in which circumstances?