1
Open the old Control Panel (not the settings app)
At the top of the old Control Panel, set view to icons
Open Power Options
On the left, click 'Choose what the power buttons do'
At the top right, click 'Change settings that are currently unavailable'
Under 'Shutdown settings' disable 'Turn on fast startup'
Save that and close Control Panel.
Restart (not shut down) your laptop to apply the change.
Then check if your laptop will shut down correctly.
2
If that does not resolve the problem.
On your Desktop, press Alt + F4.
That will bring up the shut-down dialog box, are you able to successfully shut down your laptop from there.