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can't boot


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6 replies to this topic

#1 ralph86420

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Posted 03 September 2012 - 12:45 AM

I can not get into windows. The last thing I did while using windows was delete a virtual drive. I was trying to reassign the letter of an external drive when I deleted the virtual drive with nothing mounted in it. When I load the boot menu the Internal HDD does nothing when selected, I get an unresponsive blinking white input text underscore on a black screen.

Any help would be appreciated.

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#2 AustrAlien

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Posted 03 September 2012 - 02:51 AM

... I get an unresponsive blinking white ... underscore on a black screen.

It is likely that the MBR (Master Boot Record) on the hard drive has been adversely affected.

Please try the following: You will need a USB drive/flashdrive and a new blank writable CD.

:step1: Please do the following on a working computer:
  • Download GETxPUD.exe to the Desktop.
  • Run GETxPUD.exe
    A new folder will appear on the desktop.
  • Open the GETxPUD folder and click on get&burn.bat
  • The program will download xpud_0.9.2.iso, and when finished will open BurnCDCC ready to burn the image.
    Please be patient: This could take awhile - download file size 63MB.
  • Click on Start and follow the prompts to burn the image to a CD.
You will use this CD to boot the ailing computer from.


:step2: Boot the ailing computer with the xPUD CD.
  • (You may have to configure the Boot Menu or BIOS Setup Menu to boot first from the optical/CD/DVD drive.)
    A Welcome to xPUD screen will appear.
  • Click on File.
  • Expand the mnt icon on the left (click on the little arrow beside the icon).
    • sda1, sda2 etc. ...usually correspond to your HDD partitions
    • sdb1, sdc1 is likely to correspond to a USB flashdrive, external USB hard drive etc.
  • Click on the folder that represents your USB drive (sdb1 ?).
  • Click Tool on the top menu, and choose Open Terminal.
  • Type the following at the hash prompt:

    dd if=/dev/sda of=mbr.bin bs=512 count=1

    • Note: Leave a space between the following:
      • dd ... the executable application used to create the backup
      • if=/dev/sda ... the device the backup is created from (the hard drive when only one HDD exists)
      • of=mbr.bin ... the backup file to create - note the lack of a path - it will be created in the directory currently open in the Terminal
      • bs=512 ... the number of bytes in the backup
      • count=1 ... says to backup just 1 sector
        It is extremely important that the if and of statements are correctly entered.
  • Press the <ENTER> key.
    After it has finished a file will be located on your USB drive named mbr.bin.
  • Go to Home > Power Off > Turn Off and remove the flashdrive as the system shuts down.

:step3: On the working computer:
  • Insert the USB drive, and navigate to the file mbr.bin
  • Zip-up the mbr.bin file:
    • Right-click on the file and choose Send to .. > Compressed (zipped) Folder.
      A zipped folder will appear in the same location as the mbr.bin file.
  • Please attach the zipped file to your next reply.
    This will allow the MasterBootRecord of your hard drive to be checked to see whether or not it is infected &/or damaged.

Edited by AustrAlien, 03 September 2012 - 02:53 AM.

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#3 ralph86420

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Posted 03 September 2012 - 12:00 PM

Thanks for the help and sorry for the delay in response, my alternate computer was tied up processing some data in a linux OS.

The zip file is attached.

Attached Files

  • Attached File  mbr.zip   508bytes   2 downloads


#4 AustrAlien

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Posted 03 September 2012 - 04:51 PM

Good: Thank you.

The MBR is infected with malware.
  • www.virustotal.com result > Rootkit.Boot.Wistler.a
Please sit tight and be patient for now:
  • I have requested that an experienced helper who specialises in malware-related un-bootable computers respond to your topic.
  • A suitably experienced helper will respond when they are available.

Edited by AustrAlien, 03 September 2012 - 04:53 PM.

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#5 ralph86420

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Posted 03 September 2012 - 05:28 PM

Thanks,

I appreciate your help.

#6 ralph86420

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Posted 04 September 2012 - 06:32 PM

Thanks for the help but I had a friend help me get things working again!

#7 AustrAlien

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Posted 04 September 2012 - 06:45 PM

Sorry about the delay: There are very few helpers with the necessary level of expertise, and they are kept very busy.

Thank you for letting us know that you no longer need assistance. That's got to be good news! :thumbup2:

Best wishes.
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