HP Compaq DC7900

Blue Screens with default BIOS settings (SATA emulation set to AHCI mode) There are two ways to fix this: 1. In the BIOS go to Storage--> Storage Options. Change SATA Emulation from AHCI to IDE. 2. If you want to use AHCI mode, change the BIOS to IDE mode, follow this guide, then set the BIOS back to AHCI.