Microsoft Quick Assist is an app in Windows 10 that enables two people to share a computer over a remote connection so that one person can help solve problems on the other person’s computer. Here’s how it works:
The person who needs help requests assistance from a helper (either a friend or Microsoft Support). Both start Quick Assist and the helper sends a security code to the person who needs help. The person who needs help enters the code and gives permission to the helper who is then able to take control of that person’s computer and provide assistance over the remote connection.
To open Quick Assist, select Start > Windows Accessories > Quick Assist, or type Quick Assist in the search box on the taskbar, and then select Quick Assist in the list of results.