By default Windows 10 will update your computer automatically. Use the instructions below to ensure this is occurring
Step 1: Open Windows Update Settings
Using the Windows 10 search bar in the bottom left search "Windows Update Settings" and select the systems settings link that populates.
Step 2: Select Automatic Updates
Once in Windows Update Settings select "Advanced Options".
Ensure that Automatic is selected in the drop down. You can now close the settings window.
Your Windows 10 will now update automatically.