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Ran ComboFix now PC wont boot


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#1 Mr_Chronic91

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Posted 07 August 2010 - 01:29 PM

OK so i had a trojan (Win32.muollo) and the guys over at Tech Support Guy told me to run ComboFix. So i did but whilst running my PC restarted and now it wont boot. Is there any way to fix this as i cant even reinstall my OS?

Thanks in advance for any help.

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#2 Elise

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Posted 08 August 2010 - 03:27 AM

Hello, there are various ways we can attempt to fix this. However first I want to know 2 things:
1) Can you post me the link to your topic at TSG.
2) Do you have your XP installation disk?

regards, Elise


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#3 Mr_Chronic91

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Posted 08 August 2010 - 04:11 AM

Hello elise and thank you for your reply and support. Yes i do have an XP instalation disk.

And here is the link to my thread

http://forums.techguy.org/virus-other-malw...ojan-win32.html

Again thank you very much for your help!

#4 Elise

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Posted 08 August 2010 - 05:12 AM

Hi, I'll send Rorschach112 a message to notify him I'm taking over the topic so he can close that one.

What kind of keyboard do you use (you mention its unresponsive in BIOS) USB or PS/2?

regards, Elise


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#5 Mr_Chronic91

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Posted 08 August 2010 - 05:16 AM

Hi, i use a USB keyboard. But i can push DEL to get into BIOS then it stops workihg. Dont know whether its the PC freezing or the keyboard.

#6 Elise

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Posted 08 August 2010 - 05:25 AM

Did Combofix install the Recovery Console (you should see an option to access it when starting your computer)?

At what point does your computer crash? Do you still see the XP splash screen?

regards, Elise


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#7 Mr_Chronic91

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Posted 08 August 2010 - 05:43 AM

I have run combofix in the past when dealing with malware and it did install the recovery console. No i dont that get far, it says the usual press DEL to enter setup etc. but then just hangs on a black screen with a blinking white line in the top left.

#8 Elise

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Posted 08 August 2010 - 05:46 AM

Sounds like the Master Boot Record of you drive might have a problem.

Do you have a Dell Recovery Partidion?
Do you have multiple harddisks and/or drive encryption?

Please follow these steps to create a bootable disk that will allow us to access the Recovery Console.

Please download ARCDC from Artellos.com.
  • Double click ARCDC.exe
  • Follow the dialog until you see 6 options. Please pick: Windows Professional SP2 & SP3
  • You will be prompted with a Terms of Use by Microsoft, please accept.
  • You will see a few dos screens flash by, this is normal.
  • Next you will be able to choose to add extra files. Select the Default Files.
  • The last window will allow you to burn the disk using BurnCDCC
Your ISO is located on your desktop.

regards, Elise


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#9 Mr_Chronic91

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Posted 08 August 2010 - 05:56 AM

ok thank you for your help so far. i dont have any blank cds at the moment but i will try to scavenge one up somewhere and reply once i have done as you instructed

#10 Elise

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Posted 08 August 2010 - 05:57 AM

Okay, take your time. :thumbsup:

regards, Elise


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#11 Mr_Chronic91

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Posted 08 August 2010 - 06:44 AM

Hello i have made the recovery disk, now what should i do with it?.

Thanks.

#12 Elise

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Posted 08 August 2010 - 06:48 AM

  • Insert the CD into the CD-ROM drive, and then restart the computer.

  • If your PC is not booting from the CD, you need to change the boot order:
    • Restart your PC
    • As soon as you get an image, press the Setup key. This is usually F2, or Del. On some machines the key can also be a different one. It should, however, be stated on the screen which key is the setup key.
    • Once you enter the computer's BIOS, use the arrow keys and tab key to move between elements. Press enter to select an item to change.
    • Navigate to the tab, where you can set the boot order. It should be called Boot or Boot order
    • The tab should now show your current boot order.
      If the CD-drive is not at the top, please navigate to the CD-Rom drive with the keys arrows. Then move it to the top of the list. The keys for switching boot position are usually + to move up and - to move down. However they can be different, but they should be stated in the help, so that you can find them easily.
    • Once the CD-drive is on top of the boot order, navigate to Exit and select Exit saving changes.
  • Your PC should now boot from your XP-CD.
    Click to select any options that are required to start the computer from the CD-ROM drive if you are prompted.

  • When the "Welcome to Setup" screen appears, press R to start the Recovery Console.

  • When you are prompted, type the Administrator password. If the administrator password is blank, just press ENTER.

  • A command prompt will open
Type fixmbr and press enter.

Note - if you have a Dell recovery partition, it may become unaccessible afterwards (this can be repaired as soon as we are back in windows).

When done type EXIT press enter and see if you can reboot normally now.

regards, Elise


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#13 Mr_Chronic91

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Posted 08 August 2010 - 06:51 AM

Ok i will do this now, and my PC is custom built so i doubt il have the dell recovery partition.

#14 Mr_Chronic91

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Posted 08 August 2010 - 07:14 AM

hi, it wont let me boot from cd either it just freezes at the same screen. So iv just unplugged that HDD and am installing xp on another, once that is done i shall format the broken HDD. Thank you for your help.

EDIT. Scrap that i unplugged the faulty HDD then booted from cd i got to the blue windows setup screen and then plugged the HDD back. I then entered the recovery console using my standard xp disk and typed what you said. It now says " This computer appears to have a non-standard or invalid master boot record. FIXMBR may damage your partition tables."

Is this normal?

Edited by Mr_Chronic91, 08 August 2010 - 07:23 AM.


#15 Elise

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Posted 08 August 2010 - 07:18 AM

Okay, please let me know if you need any other help.

It would also be good if you post this in your original TSG topic.

regards, Elise


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