The BIOS in this system is not fully ACPI compliant. Please contact your system vendor or visit http://www.hardware-update.com for an updated BIOS supplied by your vendor is not ACPI compliant, you can turn off ACPI mode during text mode setup. To de this, simply press the F7 key when you are prompted to install storage drivers. The syste will not notify you that the F7 key was pressed- it will silently disable ACPI and allow you to continue your installation