Quick Assist allows one person to remotely connect with another. It connects two computers so that one PC will remotely control another PC. To access this Windows 10 feature, type Quick Assist in the Search window near the Start button.
You will need a Microsoft account to sign in. If you do not have one, it is free to create and the link to do so is in the window that pops up. Create the account or sign and you will get a code to give to the user of the system you are remoting into. That person does not need a Microsoft account to allow you access.
The limitation to this utility is that the remote computer will need to have someone on site to activate the link unlike other remote access programs that can be set to open automatically.