Hi James,
Welcome to Microsoft Community!
You want to share internet connection using laptop.
To share internet connection, make settings accordingly and connect the tablet to computer using USB connection.
To make settings:
a. Right click left bottom corner
of the desktop.
b. Select Control Panel.
c. Select Network and sharing center.
d. Click on Set up a new connection or network.
e. Click connect to Internet.
f. Click Setup a new connection anyway.
g. Choose how you want to connect.
h. Put check mark for
Allow other people to use this connection.
i. Click connect to complete.
Now connect the tablet to computer using USB connection to share the internet connection.
Hope this helps. If you need any further assistance or if you face any Windows issues in future, let us know and we would be glad to help you.