Open Settings
Go to System
Select Recovery
Under Advanced startup, click Restart now
Choose Troubleshoot
Select Advanced options
Open UEFI Firmware Settings
Click Restart
In BIOS/UEFI, find Secure Boot
Set Secure Boot to Enabled
Save changes and exit
Boot back into Windows
Press Win + R
Type msinfo32 and press Enter
Check Secure Boot State
Confirm it says On