I try to install the os on a compaq proliant 5500 with 4x 500mhz xeon. I received this message: Status: 0xc0140019 ACPI Firmware (BIOS) RSDP Table is invalid. I saw in minimum requirement that you need at least 800mhz. I installed on other computer with a array controler with a 800 mhz. Worked but thiswas not a server computer but a workstation computer. 4x 500mhz is more than one 800mhz. If someone know how to solve this problem. Thank you in advance.