i have pretty much the same problem. It BSOD in low demand random moments about once a day.

Intel Core 2 Quad Q8200

and this is the error from the windows system log that pops up everytime it happens

The following boot-start or system-start driver(s) failed to load:
ASPI32
i8042prt

ASPI32 is a SCSI driver and I do not have any SCSI devices or ATAPI cdrom drives
i8042 is supposedly PS-2 support for keyboards and all I use is USB.


Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.0.6001.2.1.0.256.1
Locale ID: 1033

Additional information about the problem:
BCCode: a
BCP1: 0000000000000038
BCP2: 0000000000000002
BCP3: 0000000000000000
BCP4: FFFFF80001C60C94
OS Version: 6_0_6001
Service Pack: 1_0
Product: 256_1

tried to use windbg to read the dump file and it said something about symbols not being correct and it could not perform the function.

on blue screen it says "IRQL not less or equal " with error code 0000000a