BSOD on start up, Error 0x0000007B

[doiob]

Hello

Recently my computer began bsod on start up. Specifically during the windows start up screen (where the flag thing appears). I am fairly sure if have identified the cause, the power went out during start up. Corrupting something somewhere

At his point from looking around on the internet chkdsk seems to be a possible solution however i am worried this will cause loss of data could you please advise.

Thanks in advance doiob.

Other details
Safe mode does not work.
Im quite sure my hard drive is fine as i was able to see the c: drive with out errors in system recovery cmd.
Have tried bootrec /fixmbr and bootrec /fixboot they did nothing.

The start up repair function failed
Code given:

Problem Event Name: Start up repair offline
Problem sig 01:6.1.7606.16385
Problem sig 02:6.1.7606.16385
Problem sig 03: unknown
Problem sig 04: 116
Problem sig 05: Autofailover
Problem sig 06: 1
Problem sig 07: No root cause

I hope this all makes sense if you do not understand anything i wrote please feel free to ask. Thanks in advance.

 

[Kaktussoft]

First perform a chkdsk so

chkdsk/f c:
chkdsk/f d:

etc
post results

 

[Kaktussoft]

Stop 7B means "INACCESSIBLE_BOOT_DEVICE". Did you modify win7 to change form AHCI mode to IDE or vice versa?
Did you reset BIOS?

 

[doiob]

I had just recently killed a rootkit virus so that may have caused the problem but i doubt it. I have changed nothing in BIOS. I will run check disk but i dont have a d: drive? (To my knowledge)

 

[Kaktussoft]

I had just recently killed a rootkit virus so that may have caused the problem but i doubt it. I have changed nothing in BIOS. I will run check disk but i dont have a d: drive? (To my knowledge)

diskpart
list vol

Now you see all drive letters. chkdsk all volumes (except dvd's)

What is drive letter of windows in recovery environment?
If I know that I can give you a script

 

[Kaktussoft]

Go to BIOS settings and look at SATA settings. Most likely in "integrated peripherals" sections. All relevant SATA settings set to AHCI, IDE or RAID? Something like this

 

[doiob]

List vol gave me

Volume ### Ltr Lable Fs Type Size Status info
Volume 0 E w7sp1_homep NTFS DvD-Rom 4800 mb Healthy
Volume 1 D Recovery NTFS Partition 20 Gb Healthy
Volume 2 C OS NTFS Partition 678 Gb Healthy
Volume 3 Fat Partition 39 Mb Healthy Hidden

Thank you for helping me with this i truly appreciate it!

 

[doiob]

Under advanced in my BIOS (dell laptop)
SATA Operation AHCI
SATA Hard Drive 1 WDC WD7500BPKT0
750 GB

Sorry about the formatting in the previous message i couldn't get it to work

 

[doiob]

one more thing sorry, how do i chkdsk for specific partitions?

 

[doiob]

I belive i may have found the file causing the problem. When trying to use safe mode with command prompt i would show all the files as it loads them but every time it BSOD on the same file AVGIDSEH.sys under system 32 drivers so i believe this may be the file which as been corrupted i hope this helps.

 

[Kaktussoft]

Do:

chkdsk/f c:

any errors? if so do it again. No errors now?

 

[Kaktussoft]

So BIOS is in AHCI mode. Do you know if it always was?

Do this in recovery environment ->"command prompt" (whre you did diskpart and chkdsk as well)

[FONT=Courier New]reg  load    hklm\win7sys  C:\windows\system32\config\system[/FONT]
[FONT=Courier New]reg  query   hklm\win7sys\select  /v  default[/FONT]
[FONT=Courier New]reg  query   hklm\win7sys\controlset001\services\msahci  /v  start[/FONT]
[FONT=Courier New]reg  query   hklm\win7sys\controlset001\services\pciide  /v  start[/FONT]
[FONT=Courier New]reg  query   hklm\win7sys\controlset001\services\atapi   /v  start[/FONT]
[FONT=Courier New]reg  query   hklm\win7sys\controlset001\services\iastor  /v  start[/FONT]
[FONT=Courier New]reg  query   hklm\win7sys\controlset001\services\iastorv /v  start[/FONT]
[FONT=Courier New]reg  unload  hklm\win7sys[/FONT]

Is value of SELECT 1?
Which have start value 0?

 

[doiob]

I have no reason to belive that BIOS has changed however in my war with the rootkit it may have been changed. I personaly have not touched anything in the bios and dont think have have updated it recently>

chkdsk/f c: came up with no bad sectors and found no problems. However it "failed to transfer logged messages to the event log with status 50"

Will try those lines now.

 

[Kaktussoft]

Found it!! No need to do all the stuff I asked you to do !

c:
cd   \Windows\System32\Drivers 
dir avg*
dir/ah avg*
dir/as avg*

how many files startin with avg? If not too mmany.. post the names please

 

[doiob]

When i punch in "cd \Windows\System32\Drivers " it cant find the specified path

 

[Kaktussoft]

When i punch in "cd \Windows\System32\Drivers " it cant find the specified path

type first:

c:

 

[doiob]

Yea i did that the line reads "C:\>cd \Windows\System32\Drivers" and the response is "The system cannot find the path specified"

 

[Kaktussoft]

c:
cd \
cd windows
cd system32
cd drivers

where it says "The system cannot find the path specified" ?

 

[doiob]

Just relised why this may not be working im runing this off the windows cd i will try this again through the built in recovery cmd

 

[Kaktussoft]

Just relised why this may not be working im runing this off the windows cd i will try this again through the built in recovery cmd

It does work!! As long as C is really your win7 volume