Hang on a nanosecond... Your screenshot shows PC is trying (and failing) to boot from the Broadcom PXE ROM which means it's attempting to boot from a network drive rather than from your internal SSD. That suggests the motherboard battery is dead. So start by replacing that battery: If it still won't reboot directly from the SSD, reboot and start tapping F2 to open BIOS setup. Look for the Boot Options screen and make sure Windows Boot Manager is first on the list, and delete (disable) all options to boot from PXE (IPv4 or IPv6). Save the changes and exit setup. PC should boot itself automatically without error messages.
    I recently ran into a problem with my computer booting up. Firstly, I have a Dell XPS 8300, running Windows 10. It's rather old, but I had a new Adata SU720 HD installed in November 2020, so it was running fine until recently. When I turn it on I get the Dell logo, followed by the Reboot and select proper Boot device or Insert Boot Media in selected Boot device and press a key error. I've gotten that in the past a couple of times and was able to correct it with a restart, but this time it won't right itself. I've checked the HD cables and nothing inside seems to be out of place. I also tried assigning different drives to boot up with, but to no avail. I also ran a Diagnostics test and everything seemed fine, but the HD was not detected. A last ditch attempt, I even changed the CR2032 lithium battery in my computer. Here are some pics: [IMAGE][IMAGE][IMAGE]
XPS 8300, Hardrive not detected