Moving User Folders

Another thing I don't want to look up AGAIN . . .

This is normally only a problem if you are upgrading to Windows 10.
I usually move some of the user folders to D:\Users\MyName\Pictures (for example)
This often works fine but sometimes Windows will not recognize the location exists or it insists that Pictures is My Pictures. This is because the previous system had something else registered in the folder's desktop.ini.

Find the desktop.ini in your target folder and delete it. The easiest way to find this file is with Everything Search. Showing hidden files in explorer doesn't seem to do it for me.
You may need to restart but the problem will be gone.