The vendor from whom he had bought the PC had failed to enable XMP in the BIOS/UEFI. XMP/EXPO is one of the very first things one should enable after building a new PC, but it's not the only one.

$20,000 PC Build Nightmare Leaves DIY Builder Stuck After Failed BIOS Update by Bruno Ferreira — Monday, June 30, 2025, 01:25 PM EDT Comments ...

If your Windows PC is stuck in a boot loop after the BIOS update, perform a hard reset. This article lists some effective fixes for this issue.