Appreciate the screenshot.
Please uninstall Dell Power utility if you have not yet.
Second, Please open the Windows Recovery environment using the steps below:
Open Settings App by pressing Win+I keys.
Navigate to System> Recovery menu.
Click Restart now button, besides Advanced Startup.
Select UEFI Firmware Settings from the screen that shows up and the computer will reboot.
In BIOS, is there a sleep state option? If so, what is it set to?