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Win 7 bsod 0x0000007b after avg toolbar removal


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#1 donackle

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Posted 30 July 2013 - 06:19 PM

Greetings.

 

I recently discovered a malware looking thing on an HP laptop (4420s) calld AVG toolbar? or something like that and removed it. I then did a malwarebytes scan and found nothing. After a restart, the computer won't boot, blue screens with the error

 

0x0000007b (oxFFFFF880009A9928,0xFFFFFFFFC0000034,0x0000000000000000,0x0000000000000000)

 

Startup repair can't figure out what's wrong, can't find any system restore points.

 

Any thoughts?

 

Thanks in advance for your time,

 

Bryan



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#2 TsVk!

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Posted 30 July 2013 - 06:43 PM

That's a duzey. Could be a boot sector virus, could be a corrupted boot sector... or a corrupted boot file.

 

run 'chkdsk /f' from the command prompt in safemode. then 'chkdsk /r'

 

That will take a while, but might get you on your feet again.

 

(edit: hard drive could be stuffed also, but don't worry about that yet.)


Edited by TsVk!, 30 July 2013 - 06:44 PM.


#3 donackle

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Posted 30 July 2013 - 07:04 PM

Can't boot into safemode. Ran startup repair, advanced, command prompt and ran it from there. No help



#4 TsVk!

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Posted 30 July 2013 - 07:34 PM

chkdsk normally takes a long time... especially 'chkdsk /r'. It would appear that it did not run correctly. try 'sfc /scannow' restart and then the chkdsk commands again.

 

Then, if no joy, I suggest you go to the hardware manufacturer for the best software to diagnose your disk health, failing that there are many disk health checking softwares that can help...



#5 donackle

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Posted 30 July 2013 - 07:43 PM

Won't run sfc from the repair command prompt. Says there is a repair in progress and I have to reboot, but can only get to command prompt thru the repair ....

#6 TsVk!

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Posted 30 July 2013 - 08:03 PM

ah sorry... I can see what's going on. The machine is taking the boot cd as the target drive for the repair commands. silly me. restart first, then...

 

chkdsk C: /r

 

or replace C: with whatever your installation is on. then

 

chkdsk C: /f

 

let's see how we go now.



#7 TsVk!

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Posted 30 July 2013 - 08:08 PM

apologies for that...

 

oh, and the drive letter will be different during repair than normal also, so check out the installation you choose when you pick the repair option....


Edited by TsVk!, 30 July 2013 - 08:11 PM.


#8 sikntired

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Posted 30 July 2013 - 08:19 PM

Sorry for interjecting on such a learned colleague but

 

I think the stop 7b is an error in the AHCI and/or IDE driver related and subsequently atapi.sys, msahci.sys, iastor.sys, iastorv.sys most likely some (or all) of them

 

may have been infected as this sounds suggestive of a rootkit. These infections are really nasty and almost impossible to clean totally.

 

You may of course seek a second opinion but I think you might be looking at a reinstall. Or like I said get a second opinion in 'Am I Infected'.

 

Just my 2cents FWIW

 

Regards.................



#9 TsVk!

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Posted 30 July 2013 - 08:30 PM

I agree with you sikntired... quite possible to be a virus.

 

checking the disk for errors is a good place to start though... then disk health, as installing an OS on a bad disk is a waste of time.

 

But as you said it's nasty if it is a malware related issue, reinstall will be the quickest and surest.



#10 donackle

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Posted 30 July 2013 - 08:34 PM

Ok. Thanks for the suggestions. I ran spinrite and the hp disk tools on it and it looks fine. I'll try a few more things before I wipe it and start over. Thanks for the help.

#11 TsVk!

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Posted 30 July 2013 - 08:50 PM

did 'chkdsk x: /r' work? I had my hopes on this easy fix...



#12 hamluis

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Posted 31 July 2013 - 09:03 AM

FWIW:  How To Fix STOP 0x0000007B Errors (INACCESSIBLE_BOOT_DEVICE) - http://pcsupport.about.com/od/findbyerrormessage/a/stop0x0000007b.htm .

 

Louis



#13 donackle

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Posted 31 July 2013 - 03:03 PM

chkdsk still fails.

 

Thanks for the link Louis, still trying stuff...






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