Hi ILLEGEAR experts,

Currently my z7 is on Win10 but I wanted to downgrade to Win7. I prompted a USB bootable with Win7 but when boot up just before the Win installation screen it went to blue screen with error message BIOS is not ACPI compliant.

I've read a few about ACPI = Power Management in BIOS setting but when I go to BIOS, there is no Power Management tab at all.

Anyone can help me?