The HP PC Hardware Diagnostics is a Unified Extensible Firmware Interface (UEFI) that provides diagnostic tests to see if your PC hardware is working properly, by isolating hardware failures. After ...

You can factory reset an HP laptop using Windows Settings to revert the laptop to its original state. You can choose whether you want the reset to wipe out all personal files or only to reset Windows ...

The first easy step is to reset the CMOS and see if it helps you boot into Windows. To reset or clear CMOS, follow these steps: Force shut down your computer by pressing and holding the power button.