One of the most annoying things with Windows 10, after the too frequent updates, is that they are placing ads in the operating system. The two places where you primarily see these are are 1) on the login screen (lock screen) and 2) on the Start Menu. You paid for your computer. Part of that computer purchase included a license for Windows. Why should you see ads before you even get to the Internet? I had a client recently tell me that he kept getting pop-ups from the Microsoft Store every time he logged into his computer. Very unusual. After a little detective work, I saw that this happened because he was mistakenly clicking one of the two or three little ads Microsoft places on the login screen.
I can’t help with the ads on the Start Menu, but the login screen ads can be removed with a quick settings change.
Start Menu >> Settings >> Personalization >> Lock Screen
Change Background (menu) from Windows Spotlight to Picture.
Choose any one of the pictures provided.
Hope this helps de-clutter your Windows life!