I have an issue of unable to set my Windows 10 lock screen to the image I want to set as. I am using Windows 10 Pro and its activated.?

Oddly enough, I can change my home background just fine, but not the lock screen.
Answers

Alex

just stick your dick in the ceiling fan and it should work just fine

Bill-M

Click on START > Settings > Personalisation > Lock Screen > Background and change the setting to PICTURE. Then pick the picture you want from your pictures folder.

Starrysky

In lock screen settings, you can choose between several options. Windows changes two of them periodically. What is your setting?

Nicey8

For me, personally when I do a Windows update, the lock screen image will be changed or become blank. You can download the latest update or ask on this Windows 10 forum. Windows, since 1995, has always been buggy.