When I power up the cpu, I get the message "Boot Disk Error. Please install system disk"... what does that mean? I have an OEM version of MCE 2005, do I need a FULL retail version in order for it to be recognized? For what it's worth, the mobo CD is recognized, but it doesn't help me to install an OS. Does anyone have an idea how I can install an OS when I don't have the full retail version? Thanks in advance!