Open settings on your Windows 10 PC.
A settings Window will pop up. Select the ‘System’, the first option in the image below
Under the System Window, click on ‘Power & Sleep’. Under this window, click on ‘Additional Power Settings’
When the Additional Power Settings option opens up, you will see ‘Choose what the power buttons do‘ option in the left panel, click on it,
Once you click on ‘Choose what the power buttons do’, you will see a checkbox under the shutdown settings with text as ‘Turn on Fast Startup (recommended)’. Check the checkbox and Save changes.
Once you have saved the changes, you have turned on the fast startup for your Windows 1o PC. This will make your Windows 10 system faster with fast boot up on startup.