I have upgraded my computer today and sadly it appears that it does not boot anymore. The BIOS works fine and Windows start loading normally, but instead of showing the user selection screen, it BSODs and restarts. The BSOD is too brief for me to have time to read what it says. My old specs: nVidia GeForce 470 Chieftec 650W PSU 4GB RAM Asus P5B Intel Core 2 Duo E6600 Windows 7 Ultimate 64-bit And my upgraded specs: Same GPU Same PSU A new 4GB Kingston RAM stick (DDR3 because of the mobo) Asus P67-M motherboard Intel i5-2500k Same OS The hardware is compatible. I suspect this to be a problem with BIOS, but reverting to defaults doesn't help, nor does removing and reattaching the mobo battery. I double-checked all cables, too. The HDD with the OS is fine and works on another computer. I'm running out of ideas. Suggestions?