Hi All,I hope someone can give me some clues/solutions to the cause of this problem.My system specs are: Pent4 2.8Ghz 800FSB cpu with Hyperthreading, Gigabyte 8IPE1000 motherboard, 512Mb (2x256Mb) DDR400 Ram, Audigy soundcard, Radeon 9700Pro 128Mb graphics card, WinXP Pro with all updates and service packs applied. All drivers are up-to-date.Occasionally when I'm running FS2002 or FS2004 the system will crash with a blue screen showing IRQL_NOT_LESS_OR_EQUAL and STOP 0x000000A (0x000E1950,0x00000002,0x00000001,0x806BB6CA). There is no mention of a driver or DLL file (which I have seen on other systems at times). It doesn't happen very often and also I have yet to experience it if I disable Hyperthreading in the BIOS. This only happens when I'm running either of the Flight Sim programs.I searched Microsoft's knowledgebase but found nothing related to my problem. There are entries related the specific STOP code but nothing seems to relate to my issue exactly.Has anyone else experienced this? Could it be something just not compatible with Hyperthreading? Any ideas?Thanks in advance.Adrian

It's not much info to go on, but that particular error is only generated by drivers, never a DLL. Since it only happens when HT is enabled, it probably means that whichever driver is causing it is not properly written to handle multiprocessor machines (HT looks more-or less like a multiprocessor at the driver level), which would pretty much rule out the MS-supplied drivers. They're pretty well tested for that sort of thing.My first suspect would be the Audigy drivers, but it's hard to say. If you've really got the latest Audigy's, you might try disabling the sound card and see if the problem clears up. Finding it won't fix it, but at least you'd know who to whine to.- BobThe StickWorkshttp://www.stickworks.com

Thanks Bob. At least now I know where to start looking.I think I recall reading something about the latest Audigy drivers having some fix for HT problems, maybe they haven't sorted the issue out completely.Adrian

When I built my new computer I had pretty much the same problem, incompatabilies between hyperthreading and my Asus P4PE so I went to the Asus website and there was a new Bios available, in the support notes it said it 'carried support for new Processors', i installed that one and the problem has never occured since, so you might want to have a look if there are any available :-hmmm anyway, From Microsoft;Stop 0x0000000A or IRQL_NOT_LESS_OR_EQUALThe Stop 0xA message indicates that a kernel-mode process or driver attempted to access a memory location to which it did not have permission, or at a kernel interrupt request level (IRQL) that was too high. A kernel-mode process can access only other processes that have an IRQL lower than, or equal to, its own. This Stop message is typically due to faulty or incompatible hardware or software.and to try and resolve it see here; http://www.microsoft.com/technet/treeview/...md_stp_hwpg.asp