Computer starts but freeze

when I start I get a message: Panic (cpu O caller 0X003AB787) unable to find driver for this platform "ACPI"
I tried to reboot W/install disc but wont excecute? I tested the hardware and had no problem response? How do I get it started? Thanks

I see you've put Windoze XP I'll give you answer for osx, try running and quitting garageband.
I had this problem and it worked for me, don't know why!
Found the answer after downloading Audacity and it trashed my sounds! So thanks to poster on their forums.
Nick
imac 20 g5   Mac OS X (10.4.6)  

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