Microsoft BSOD

Hey, I have an old IBM NetVista that has been being used for the last 5 years, now this morning I get these messages talking about ACPI BIOS is not compliant. Is there a quick fix? I do not have a copy of Windows 2000 to use to run the F6 option.

Stop Codes are
0x000000a5, 0x00000001, and 0x818b0a08 (this last one is not coming up with anything on my searches)