If you need to share your screen for assistance, you can use the Microsoft Quick Assist application. You may have a shortcut to Quick Assist on your Desktop:

 

 

Otherwise, you can launch Quick Assist with one of these methods:

 

• Select Start , enter Quick Assist, then select it from the list of results.
• Press Ctrl + Windows logo key + Q.

 

Once Quick Assist opens, you will see a screen where you can request or offer assistance:

 

 

If someone is helping you, they will provide a code you can enter and submit. If you wish to offer help, click "Help someone" to generate a code you can provide.

 

NOTE: If prompted for your credentials, use your email address and password.

 

You can read more about Quick Assist in this article: Solve PC problems remotely using Quick Assist