Windows doesnt boot anymore , amd format gives problems aswell. [K8N Neo2]

Question

hi guys,
i made a thread about this issue in the dutch MSI forums aswell, but the more help the better no? 
i'll first start with my system specifications , so we have that out of the way:
Motherboard: MSI K8N Neo2 Platinum (s939) bios v1.5 (tried 1.B but that didnt solve my problem)
Processor: AMD Athlon 64bit 3500+ (2.2Ghz) (dont know the core , i think it was newcastle)
Geheugen: 2X Crusial BallistiX CL2 PC 3200 512MB (i also have 2x Corsair XMS PC3200 CL2 memory, but i only equipped my computer with the Crusial BallistiX memory atm)
Videocard: Sapphire Radeon X850 XT PE
Power Supply: Enermax 20 / 24pins 32A on the 12V line
well, my problem started about 2 days ago, when i shut down my computer, since the F.E.A.R demo ran a bit laggy ( i had all 4 of my memory modules in my PC then, and i wanted to remove the corsair memory ) once removed i only had the Crusial BallistiX memory in it , in dual channel , slot 1 and 2 (slots closest to CPU) , but once i booted my computer, i got a BSOD just after windows loaded.. something about the ACPI. the STOP number was:
STOP: 0x000000A5(0x00000011,0x00000007,0xF771F180,0x0100000E)
then i putted my corsair memory back in, but then i still got this BSOD.. and it said something about the BIOS, so i updated my bios to 1.B , but that didn't help a bit, so i donwgraded my bios again to v1.5 , hich i have now. i only have the crusial ballitix installed atm, which runs stable according to memtest (ran it for 14 hours, then i stopped it) with this timing: 2.5-2-2-5 1T  (Cas latency 2 just wont run stable)
so my memory is OK i suppose.. and wlel, i couldnt get into windows, so as a final solution, i decided to format the harddrive, so i entered my WindowsXP CD , and it began loading the drivers (and i pushed F6 , and loaded the S-ATA / Raid Drivers ) , but straight after it loaded the things of the CD i get:
- a BSOD , with something about the ACPI
- reboot
- flashing underscore in the upper left courner..
so i cant really do anything , except get into the BIOS. i also tried to start windows in safe mode, but then i get a message similar to this:
'Cannot start windows , because the following file is damaged or missing:'
<windows-mainfolder>\system32\ntoskrnl.exe
so i first thought about a virus, but that seems kinda odd , since i run a virus scan everyday (my virusscanner is NOD32) , and i think a virus with such destructive power will be detected..
another number from a BSOD (i get this one most of the times now) is this:
*** STOP: 0x0000007E (0xC0000005,0x804F35C1,0xF7C45F10,0xF7C45C10)
hopefully you guys have an idea what to do, and as a final solution, i am willing to afford a new harddrive, but will that solve my problem? or is something else causing this problem?
Yordy_
(sorry for my bad english, i'm dutch  )
*edit*
something i forgot to mention, is that sometimes when i enter the BIOS , it just freezes ( i cannot do anything.. )

Answer 1

Quote
Try another CmosClear like mentioned before for the DMI-Pool and PNP Area to reinitialise.
didnt really get that, but i removed the CMOS battery , and placed it back in again , but that didnt help, and by the way, my problem got worse :(
i didnt do anything really.. just trying to start my computer .. but i can currently do this:
1. Press power on button
2. watch screen
3. press power button to shutdown
and that is as good as it gets :(
it sais to press del to get into the BIOS,but no matter what i press, it doesnt matter.. it then goes to the post screen, and displays this message:
CMOS Checksum failed! Loading defaults
something like that.. and here the system is totally frozen so i have to power off / reboot
and before hat message i cannot push a button!
I dont think my motherboard can be rescued can it?