Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: BSOD - iaStor.sys issue

26 Apr 2011   #1

Windows 7 Home
BSOD - iaStor.sys issue

I just ran into a BSOD randomly today while studying for finals (go figure). Anyways, I have not installed any new software prior to the BSOD. Essentially, the computer froze up while reading a .pdf, so I attempted to restart the computer with no success. I started the computer in safe mode and was in the middle of running a virus scan from Malwarebytes when the BSOD occurred. Below is the error message:

***STOP: 0x00000001 (0x0000000000000004, 0x0000000000000002, 0x00000000000000(rest is cut off), 0xFFFFF880012E5964)
***iastor.sys - Address FFFFF880012E5964 base at FFFFF880012E2000, Datestamp 4b8f2033

After receiving the message I took a look around for similar messages and tried some of the various remedies that I could. I've run the Kaspersky Rescue Disk which didn't find anything. It doesn't allow me to install new software that uses the windows installer, so I could not try the intel device update manager or the rootkit eliminator. I ran a disk chk but I got a BSOD that was slightly different. Here is the error message I received:

Technical Info:
***STOP: 0x0000007E (0xFFFFFFFFC0000005, 0xFFFFF8800107D57E, 0xFFFFF88003325948, 0xFFFFF88003325180)
*** iaStor.sys - Address FFFFF8800107D57E base at FFFFF88001008000, DateStamp 4b8f2033

After seeing the second error with a different code, I decided to throw it out to the experts here and give up on trying to figure it out myself. My system is running Windows 7 Home Premium 64bit (OEM) and is 9 months old with the original OS installed. If you need any additional info, don't hesitate to ask. Attached is the BSOD dump but I could not get the system health report working properly in safe mode. Thanks for the help!

Edit: I was able to get my BSOD dump uploaded online. Here is the link: http://www.**************/?zep722ei73ie56s

My System SpecsSystem Spec
27 Apr 2011   #2

Windows 7 Professional x64


This is being caused by a notorious rootkit, I'm afraid. I'll let you make a choice here, and try to tell you about each one.

The first and probably best option is a complete wipe and reinstall. Depending on how much stuff you have installed, it might even be faster. It is certainly the safer option, because even if we can remove/disable the rootkit, you never know what pieces are lurking behind.

To do this, boot up an Ubuntu Live CD, and start copying your important files to an external hard drive or USB stick. I'm not sure if you'll have CD and DVD burning capabilities, but it wouldn't surprise me. If you want to use DVDs, give it a try!

Then stick in the Windows installation DVD and wipe the hard drive completely using the Clean All command: Disk - Clean and Clean All with Diskpart Command

If you are dead set against a reformat, we can try to monkey around first. Bear in mind, this has proven to be extremely difficult to remove, and what works for one person doesn't always help another. My own success has been very limited, though I might blame much of that on the fact that people don't post back when I give advice. In other words, there's a chance that our monkeying around will be futile and we'll have to do a reformat in the end anyway.

I can give it my best shot, and I know one other person on SF who has been able to remove them in cases such as yours.

It's up to you.
My System SpecsSystem Spec
27 Apr 2011   #3

Windows 7 Home

Jonathan King,

Thanks for the response. I was afraid you were going to suggest a reformat. Fortunately, I don't have any files on this computer that aren't readily available elsewhere. I went ahead with the reformat and it has removed the problem. A quick question, any ideas as to where this rootkit could have been contracted? I want to minimize my chances of this happening again. I'm also curious as to where you get your driver updates from. I'm having issues finding if my drivers are up to date.

Thanks for the guidance,
My System SpecsSystem Spec

27 Apr 2011   #4

Windows 7 Professional x64

I wish I knew where the virus came from. If I can ever find that, I will intentionally infect a virtual machine just so I can figure out how to remove it. Let me know if you find the answer yourself!

As far as the driver updates, I can get a list of loaded drivers from the dumps and other files from the jcgriff2 report. If I see one I think might be the cause, I find a link on the manufacturer's website.
My System SpecsSystem Spec

 BSOD - iaStor.sys issue

Thread Tools

Similar help and support threads
Thread Forum
BSOD playing League of Legends (nvidia or iastor.sys driver issue?)
System specs: Self built rig *OS = Windows 7 home premium 64 bit full retail (installed about 1 year ago) *Asus P8P67 deluxe mobo *i5 2500k (no overclock) *2 PNY nvidia gtx 570 graphics cards (also stock settings) *8GB Memory (2x4gb) DDR3 1333 *120GB Kingston SSD
BSOD Help and Support
BSOD Iastor.sys
Hello folks. I've started to get BSODs while burning discs in Nero 8 of the IRQ LESS THAN OR EQUAL TO (or something like that :p) type for Iastor.sys Of course, first thought is the rootkit. Ran TDSS tool but no hits come up. - W7 Ult x64 clean install - Full retail version - Have only...
BSOD Help and Support
BSOD iastor.sys
well I ended up getting bsod, then getting black screen, but eventually after running trying quite a few ways I was able successfully run system recovery, I am wondering if I should delete iastor.sys, to stop it from ever occurring again?.
BSOD Help and Support
High CPU usage after waking up - iastor.sys issue
Hi :D I'm running Windows 7 x64 on my ASUS laptop It works very well , until I have it Sleep . A few minutes after waking up , I realize that the CPU usage reaches 9x-100% , caused by SYSTEM process (2x-30%) , which makes me almost unable to work on it . I used Process Explorer to explore the...
General Discussion
BSOD Help - iaStor.sys
Greetings, Looking for general help. My computer has been buggered for about 2 weeks now. We have intermittent use but now it simply won't load up at all. Start up repair says it's fine. Memory check is fine. Scandisk also fine. I get to the login screen, all is well, I then get...
BSOD Help and Support

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 15:15.
Twitter Facebook Google+