I have been suffering with system crahes for some time now. To be honest I was putting up with it because I couldnt be bothered to do anything about it. They have become more frequent and I should really do something about it. I followed the information in a post on another forum in order to be able to examine the error dumps. I seem to be getting many different programs as the cause of the problem and am not sure how to proceed. These range from games to things like VLC and Outlook. I am not very experienced at debugging these sorts of problems and so I was hoping someone may be able to help. I have included a sample of one of the crash dumps in the hope that someone can help. I can provide many more (there are currently 146 in my \Windows\Minidump folder ) if needed. Many thanks for any possible help. ************************************************** ***************************** * * * Bugcheck Analysis * * * ************************************************** ***************************** IRQL_NOT_LESS_OR_EQUAL (a) An attempt was made to access a pageable (or completely invalid) address at an interrupt request level (IRQL) that is too high. This is usually caused by drivers using improper addresses. If a kernel debugger is available get the stack backtrace. Arguments: Arg1: fffe4080, memory referenced Arg2: 00000002, IRQL Arg3: 00000001, value 0 = read operation, 1 = write operation Arg4: 806ee2dc, address which referenced memory Debugging Details: ------------------ WRITE_ADDRESS: fffe4080 CURRENT_IRQL: 2 FAULTING_IP: hal!HalpStopOhciInterrupt+5c 806ee2dc 890d8000feff mov dword ptr ds:[0FFFE0080h],ecx CUSTOMER_CRASH_COUNT: 2 DEFAULT_BUCKET_ID: DRIVER_FAULT BUGCHECK_STR: 0xA PROCESS_NAME: Civ4Warlords.ex LAST_CONTROL_TRANSFER: from 80565674 to 806ee2dc STACK_TEXT: ae043cf0 80565674 00000000 00000001 00000000 hal!HalpStopOhciInterrupt+0x5c ae043d54 804de7ec 00000054 00000000 1863fe24 nt!ObpReferenceSecurityDescriptor+0x35 ae043d64 7c90eb94 badb0d00 1863fe1c ae043d98 nt!KiUnexpectedInterrupt65+0x2 WARNING: Frame IP not in any known module. Following frames may be wrong. ae043d68 badb0d00 1863fe1c ae043d98 ae043dcc 0x7c90eb94 ae043d6c 1863fe1c ae043d98 ae043dcc 00000000 0xbadb0d00 ae043d70 ae043d98 ae043dcc 00000000 00000000 0x1863fe1c ae043d74 ae043dcc 00000000 00000000 00000000 0xae043d98 ae043d98 00000000 0f2d5eac 1863fd48 1863fd48 0xae043dcc STACK_COMMAND: kb FOLLOWUP_IP: nt!ObpReferenceSecurityDescriptor+35 80565674 ?? ??? SYMBOL_STACK_INDEX: 1 SYMBOL_NAME: nt!ObpReferenceSecurityDescriptor+35 FOLLOWUP_NAME: MachineOwner MODULE_NAME: nt IMAGE_NAME: ntoskrnl.exe DEBUG_FLR_IMAGE_TIMESTAMP: 42250ff9 FAILURE_BUCKET_ID: 0xA_W_nt!ObpReferenceSecurityDescriptor+35 BUCKET_ID: 0xA_W_nt!ObpReferenceSecurityDescriptor+35 Followup: MachineOwner ---------