FIXED BY INSTALLING THE LATEST DELL UPDATE APPLICATION 24 AUG 2022 VERSION. IT UPDATED THE LAPTOP'S INTEL I/O DRIVER. AND IT FIXED MY AUTO RESTART ISSUE.
I'm thinking that this is a BIOS ISSUE but could not currently downgrade, due to bios not supported whenever I try downgrading to bios ver. 1.2.10 or below. I installed the latest 1.5.0 bios to the laptop thinking that it would fix all this issues, but it started this booting up automatically after 10 seconds of shutting down. Another observation is whenever I plug the wifi card and plug in the laptop battery or AC ADAPTER. The laptop boots up automatically without pressing the power on button.Things I have done:1. (UEFI) Installed latest version of Windows 10 OS 21H2 - issue still there2. Turned off Fast boot on power management options - issues still persists3. SFC Scan - still having issues4. Replaced CMOS Battery with a brand new one.5. Changed to Legacy Boot and installed Windows 10 OS 21H2.6. Changed brand new wifi card. - issue still there.7. Disabled allow wake timers.8. Disabled Network Card from power saving9. Disabled automatic restart incase of system crash.10. Removed Intel Management Engine Interface.11. Run Diagnostics Test on BIOS - Everything Passed12. BIOS RESET TO DEFAULT13. BIOS RESET TO FACTORY SETTINGS. I'm open to any suggestions and would be glad to reflect which one worked.
DELL 15 5567 RESTARTS AUTOMATICALLY 10 SECONDS AFTER SHUTDOWN