Sounds like Dell Update. The following post will help. It can be disabled and updates downloaded manually.

https://www.dell.com/community/Windows-10/Is-Dell-Update-needed-in-Windows-10-What-does-it-update-exactly/td-p/4742301

Now if it is actually Windows update, that is another story. Microsoft decided to change the update procedure for Windows 10. Updates are no longer optional, you have to get them.

This offers ways to turn off auto update

https://www.windowscentral.com/how-stop-updates-installing-automatically-windows-10