Help!!!

my new imac came today, and i boot it up, looking and working great.
i let it run through the updates, and i come back shortly after and its at a grey screen with the loading icon.
it does this for some time, so i leave it come back in about 45 minutes and its still doing this, so i manually restart.
upon restart i get an error:

panic(cpu 0 caller 0x003a934f): Unable to find driver for thiss platform: "ACPI".

Debugger called: <panic>
and so on...

the message in the center of the screen sais, " you need to restart your computer. Hold down the power button for sever...

after resatrting numerous times and getting the same message,
i reeinstall tiger thinkin a fresh install will fix it,
but after doing so i get the same error,
also the hardware test shows no issues.
does anyone have a clue what the issue is?

 

i thought for sure the smc reset would do it,
but nothing.
this is stupid lol

 

i will run through it again but so far nothing has worked,
not to impressed lol, but it was a good 5 minutes
you you mean hold d for diagnostics?

 

would formatting the disc and reeinstalling os x wreck everything?

 

im in disk utilities and i have done first aid.
i can erase partition RAID or restore as well

 

i'm quite dissapointed here,
you spend 1500 dollars on an imac,
and from what ive read, its the itunes update which turns it into a melon.
ill have to contact apple, send it back, and wait another 4 weeks untill im back from holidays to get any work done.

 

this is what i recieve,
so if anyone knows anything about "kernal panic" please let me know
http://docs.info.apple.com/article.html?artnum=106227
thanks again

 

good news,
i formatted the drive,
and did a fresh install,
and its working good,
im just afraid to make any updates, i have a feeling the 10.4.10 combined update will hurt the imac again.
but good to be using it and its a vast improvement from an emac.
thanks for the help