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BSOD - iastor.sys


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#1 Andrew Fiedler

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Posted 12 January 2012 - 08:56 AM

So my new computer has been working fine, and I tried to activate windows and the world blew up. Hoping someone can help.

I've got just one HDD (no raid) with windows 7 64 bit ultimate installed. It has not yet been activated (did a clean install, and having trouble with activating windows)

In my attempt to activate windows, I did this:

  • Changed the MediaBootInstall value from 1 to 0 at the registry location below:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\OOBE
  • Ran the command slmgr -rearm from elevated command prompt
  • reboot

Afterwards, my computer crashes while loading windows with this BSOD (replaced repeating characters with periods):

iastor.sys Stop 0x0000007E, 0xF...C0...5, 0xFFFFF8001256C73, 0XFFFFF8800397E458, 0XFFFFF88397DCB0
Address FFFFF88001256C73 Base at FFFFF880012213000 (omit date)

I had limited paper space while writing down this error, so I can update this with exact if needed for troubleshooting.

Here is what I have tried already that didn't work:
  • Boot to safe mode (BSOD)
  • use built in windows repair (Fail)
  • system restore (worked but didn't fix BSOD)
  • rolling back to a backup created using windows backup 3 days prior (left this to run overnight, not sure if it worked by was on BSOD when i woke up)
  • ran these commands from command prompt in recovery mode (after changing to appropriate drive letter): sfc /scannow, bootrec.exe /fixmbr & "" /fixboot
  • downloaded the latest intel storage driver from their site, rename iastor.sys in my system32\drivers directory, copy new iastor.sys file to directory (I did notice that the address changed slightly after I did this in the BSOD error)

Here is what is on my list to try tonight, but I am skeptical of these solutions, as I think it quite unlikely that I have a virus:
  • change bios HD mode to compatability from AHCI (default) - worth a shot I guess...
  • run tdsskiller (boot using hirens boot cd)
  • completely delete iastor.sys from drivers directory

I would like to avoid re-installing windows if at all possible. The whole process probably took me at least 6 hours on round 1 and that isn't my idea of a fun day with my new rig.

My specs for reference:
Motherboard - Asus P8Z68-V Pro/Gen3
CPU - Intel Core i7-2600K
RAM - 32GB G.Skill Ripjaws X Series (4X 8GB)
Video Card - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
Power Supply - Corsair Enthusiast Series TX850 V2 850W
Hard Drive - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA 6GB

Edited by Andrew Fiedler, 12 January 2012 - 09:27 AM.

System Specs
MOBO - Asus P8Z68-V Pro/Gen3
CPU - Intel Core i7-2600K
RAM - 32GB G.Skill Ripjaws X Series (4X 8GB)
GPU - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
PSU - Corsair Enthusiast Series TX850 V2 850W
SSD - Crucial M4 256GB SATA III
HDD - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA III

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#2 cryptodan

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Posted 12 January 2012 - 09:02 AM

What are your computer specs?

Motherboard, RAM, CPU, and video card?

#3 Andrew Fiedler

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Posted 12 January 2012 - 09:26 AM

Added to original post:
Motherboard - Asus P8Z68-V Pro/Gen3
Processor - Intel Core i7-2600K
Memory - 32GB G.Skill Ripjaws X Series (4X 8GB)
Graphics Card - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
Power Supply - Corsair Enthusiast Series TX850 V2 850W
HDD - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA 6GB

Edited by Andrew Fiedler, 12 January 2012 - 10:06 AM.

System Specs
MOBO - Asus P8Z68-V Pro/Gen3
CPU - Intel Core i7-2600K
RAM - 32GB G.Skill Ripjaws X Series (4X 8GB)
GPU - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
PSU - Corsair Enthusiast Series TX850 V2 850W
SSD - Crucial M4 256GB SATA III
HDD - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA III

#4 cryptodan

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Posted 12 January 2012 - 09:41 AM

Is this an already clean install of windows or is it an existing one?

#5 Andrew Fiedler

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Posted 12 January 2012 - 09:48 AM

I built the computer from scratch, the hard drive was completely blank when I installed windows - so it is a clean install. It has been working without hickups for over a week and I have rebooted several times since any relevant items have been installed on the machine (windows updates, drivers, software, etc)

I did not realize the key I purchased was upgrade only ... in fact I was assured by the folks I bought it from that it was a standalone. I do own 3 copies of windows 7, 2 of vista, and who knows how many XP ... I might end up having to call Microsoft to get this one activated, since the last thing I want to do is install an old os and then copy over it.

Do you think the error has to do with the registry change I made (e.g. windows activation)?

Edited by Andrew Fiedler, 12 January 2012 - 10:06 AM.

System Specs
MOBO - Asus P8Z68-V Pro/Gen3
CPU - Intel Core i7-2600K
RAM - 32GB G.Skill Ripjaws X Series (4X 8GB)
GPU - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
PSU - Corsair Enthusiast Series TX850 V2 850W
SSD - Crucial M4 256GB SATA III
HDD - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA III

#6 cryptodan

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Posted 12 January 2012 - 09:53 AM

No the error is probably caused by either an infection or dying hardware.

We need to know more about your BSODs...

Download BlueScreenView (in Zip file)

No installation required.

Unzip downloaded file and double click on BlueScreenView.exe file to run the program and When scanning is done, go to Edit > Select All.

Then go to File > Save Selected Items, and save the report as BSOD.txt.

Open BSOD.txt in Notepad, copy all content, and paste it into your next reply.

Compliments of Broni

#7 Andrew Fiedler

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Posted 12 January 2012 - 09:58 AM

I can't boot windows... I can pull the HDD and connect it to my other computer to get files though, if that is what you're suggesting...

Or maybe there would be a way to run this from the command line and save a text file of the results?

[edit] just realized the quotes are annoying when reading the thread. deleted them.

Edited by Andrew Fiedler, 12 January 2012 - 10:07 AM.

System Specs
MOBO - Asus P8Z68-V Pro/Gen3
CPU - Intel Core i7-2600K
RAM - 32GB G.Skill Ripjaws X Series (4X 8GB)
GPU - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
PSU - Corsair Enthusiast Series TX850 V2 850W
SSD - Crucial M4 256GB SATA III
HDD - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA III

#8 cryptodan

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Posted 12 January 2012 - 10:24 AM

Can you perform a Repair Installation?

Via hitting F8 just after the BIOS Splash screen?

#9 Andrew Fiedler

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Posted 12 January 2012 - 10:31 AM

Can you perform a Repair Installation?

Via hitting F8 just after the BIOS Splash screen?


If you look at my original post, I listed my repair attempts under things I already tried. All of those were performed via the F8 after splash repair option.
System Specs
MOBO - Asus P8Z68-V Pro/Gen3
CPU - Intel Core i7-2600K
RAM - 32GB G.Skill Ripjaws X Series (4X 8GB)
GPU - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
PSU - Corsair Enthusiast Series TX850 V2 850W
SSD - Crucial M4 256GB SATA III
HDD - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA III

#10 cryptodan

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Posted 12 January 2012 - 10:57 AM

When you attempted the repairs did you get any error codes?

#11 Andrew Fiedler

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Posted 12 January 2012 - 10:59 AM

When you attempted the repairs did you get any error codes?


The automated repair said it could not complete (no error code)
the system restore compelted sucessfully, but still got the BDOS on restart
not sure of the backup restore, I left it overnight and the next day woke up to the BSOD (assuming it was sucessfull and rebooted)
none of the command line items gave errors, just said they completed sucessfully
System Specs
MOBO - Asus P8Z68-V Pro/Gen3
CPU - Intel Core i7-2600K
RAM - 32GB G.Skill Ripjaws X Series (4X 8GB)
GPU - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
PSU - Corsair Enthusiast Series TX850 V2 850W
SSD - Crucial M4 256GB SATA III
HDD - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA III

#12 cryptodan

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Posted 12 January 2012 - 11:01 AM

the automatic repair should have generated log file. You may need to pull it out to access it.

try changing the hdd settings in the BIOS.

#13 Andrew Fiedler

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Posted 12 January 2012 - 11:10 AM

the automatic repair should have generated log file. You may need to pull it out to access it.

try changing the hdd settings in the BIOS.


I will try changing the HD settings when I get home (1700 EST). If it still gives me the error in compatibility mode, I can pull the drive and get files on my other computer. Assuming I should get the repair log and the bdos file. Can you tell me where these are located?

If changing the bios HD setting to compatibility works, what should my next steps be once windows boots?

I find it very strange that this error would just begin happening out of nowhere without me changing anything except a registry setting related to windows activation. Critical mind having a hard time rationalizing what triggered the error if it is not hardware failure.

Edited by Andrew Fiedler, 12 January 2012 - 11:12 AM.

System Specs
MOBO - Asus P8Z68-V Pro/Gen3
CPU - Intel Core i7-2600K
RAM - 32GB G.Skill Ripjaws X Series (4X 8GB)
GPU - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
PSU - Corsair Enthusiast Series TX850 V2 850W
SSD - Crucial M4 256GB SATA III
HDD - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA III

#14 cryptodan

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Posted 12 January 2012 - 11:20 AM

Were you actively surfing the net without being activated and without using ample security?

If it works, then I would recommend downloading updated drivers for everything.

How to Test your RAM



Guide Overview

The purpose of this guide is to teach you how to check whether your system's RAM (Ramdom Access Memory) is working properly. Bad RAM can lead to a whole host of problems, often which do not appear to have a single cause -- appearing as systemwide glitches, blue screens, and other system trouble. MemTest86+ provides a very good detection mechanism for failed RAM, and is about as good a test you get short of actually replacing the module itself.

Tools Needed
Please perform these steps from a separate, working, machine.Perform these steps on the problem machine.
  • Put your CD in the drive and configure your machine to boot to the CD. This is different on all machines, but it's usually by pressing F12 or F10 as your system boots, and selecting either "CDROM" or your cdrom drive. If you are unable to force a CDRom boot, reply with the make and model of your machine and I should be able to get you exact instructions.
  • If you've done it correctly, MemTest86+ will start to run automaticly, as shown below:
    Posted Image
  • If you want to be reasonably your RAM is OK, then allow MemTest to run until you see this message:
    Posted Image

    On the other hand, if you want to be completely sure your RAM is OK, allow MemTest to run overnight. Memtest will run forever until power is pulled on the machine.
  • Check the MemTest screen for any reported errors. Errors will appear as RED warnings at the bottom of the screen, similar to the following screenshot:
    Posted Image
  • Hard-Reset the machine, removing the MemTest disk in the process.
If you didn't get an error screen, Congratulations! :)

Compliments of Billy O'Neal.

#15 Andrew Fiedler

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Posted 12 January 2012 - 11:29 AM

What does windows activation have to do with security? I must be ignorant on this. I was surfing the net ... only on sites I trust like newegg, hardware manufacturers, facebook.

For security I have AVG Anti-Viris Free, and I also run malewarebytes and superantispyware. I plan to install Microsoft Security Essentials, as I have heard it is decent protection as well.

As far as updating drivers, I pretty much did this already, as I just installed the OS and then went out to all the manufacturer sites to obtain the most up-to-date drivers. I certainly plan to update the one in question (intel storage media) even though I'm not using RAID.

Why the MemTest instructions? You think this could be a RAM issue?

Also, if changing the bios HD setting doesn't work, which log files should I be retrieving?

Edited by Andrew Fiedler, 12 January 2012 - 11:42 AM.

System Specs
MOBO - Asus P8Z68-V Pro/Gen3
CPU - Intel Core i7-2600K
RAM - 32GB G.Skill Ripjaws X Series (4X 8GB)
GPU - EVGA Geforce GTX 580 (Fermi) 3GB 384-bit GDDR5
PSU - Corsair Enthusiast Series TX850 V2 850W
SSD - Crucial M4 256GB SATA III
HDD - Seagate Barracude ST31000524AS 1TB 7200 RPM SATA III




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