Windows7 X64 - Blue Screen!!!

Win7 Home Premium X64 is loading to the desktop, then it crashes to a blue screen error in less than a minute after the desktop appears. All the icons are visible, and the crash occurs with or without any input from the user. Here's the info:
DRIVER_IRQL_NOT_LESS_OR_EQUAL
0x000000D1 (the 2nd group of four long numbers varies and is different every time the PC crashes; but the 0x000000D1 is the same every time).
iaStor.sys

The PC will crash to this error in Normal mode; the PC simply locks up in Safe Mode; Last Known Good Configuration did not help. I can't use System Restore because I'm told that "no restore points exist on the system". I have tried the "Startup Repair" option from the Win7 install disc and that did nothing. I replaced the iaStor.sys file in the 3 different places it appears but that made no difference (I did this via a PE boot CD). I manually searched for malware (again via PE) and found nothing (at least nothing obvious). I'm running a memory diagnostic now, a hard drive test is next. Any thoughts, suggestions, or links will be appreciated!!!

(I've done some searching at the MSKB and haven't found anything real helpful just yet but I'm still looking)

 

Hello,
I found this from Microsoft.

Wondering if this has anything to do with the acpi.sys rootkit? Not sure if it affect Windows 7 X64 though.

 

There could be a couple things that you can do to try and remedy this, chiefly either trying a system restore or doing a clean install altogether. There are a few more tips on the Windows site worth checking out that may be of some use to you: http://windows.microsoft.com/en-us/windows7/Resolving-stop-blue-screen-errors-in-Windows-7

-- Ryan
Windows Outreach Team

 

So System Restore is out. LOL Probably will go with a de-partition > re-partition > re-format > re-load... mainly because everything else I've tried up to this point has been unsuccessful. Thanks for the link w7pro. I'll check it out in a few minutes.

The thought had crossed my mind that it might have been a rootkit or a driver-level type of infection, but none of the files in system32\drivers have 'modified' or 'created' dates newer than mid-June 2010, and the PCs owner said the crashing just started on 12/24/2010. I know the dates don't always mean that something is (or isn't) infected, but they can be a good indicator. I also checked the file sizes of several important drivers (but not the acpi.sys file 'cuz I hadn't read these replies yet) and they were all right on the money. Again- thanks for the link and info, I'll check it out!

 

It is a issue with Intel's Matrix storage driver. This issue has been around as far back as Windows XP. Check Intel's & your computer manufacturer websites for an updated driver. Also, you can uninstall it, and Windows 7 should load the default when it boots back up into the GUI.

 

Since the PC crashes in less than 30 seconds after the desktop loads, there is no way to perform a proper driver uninstall/reinstall. I also ended up deleting all the Intel "iaStor" files and related files and replaced them all with the newest versions available from both Intel and the manufacturer's web site, and again, no dice. I finally just saved the user's data to an external drive, deleted the partition, and reinstall a clean OS. So, the issue has been "solved".

Thanks for all the help everyone!

:-D