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"No Operating system Found"


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2 replies to this topic

#1 marco_dude

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Posted 09 February 2011 - 10:23 AM

Hi There,

Looking for some help with my PC which was infected with the Anitmalware Doctor virus on Monday.

The software took complete control of my computer and without really thinking i closed down. Now i am getting on boot "PXE media disconnected, check cable" then " No operating system found"

I have tried using the recovery console on the XP disk but it does not even show that i have a C Drive?
Commands
fixboot C:
chkdsk
do not work.
i do not get the option to boot into safe mode.
I tried using the Kasperski anti virus CD, but the scan location only showed "boot files & startup items" and nothing about my C: drive and it only lasted around 30 seconds. So i am pretty sure it never worked.

Any help guys would be great!!

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#2 Elise

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Posted 10 February 2011 - 02:39 AM

Hi, and welcome to BleepingComputer!

Try this please. You will need a USB drive.

Download GETxPUD.exe to the desktop of your clean computer
  • Run GETxPUD.exe
  • A new folder will appear on the desktop.
  • Open the GETxPUD folder and click on the get&burn.bat
  • The program will download xpud_0.9.2.iso, and upon finished will open BurnCDCC ready to burn the image.
  • Click on Start and follow the prompts to burn the image to a CD.
  • Remove the USB & CD and insert it in the sick computer
  • Boot the Sick computer with the CD you just burned
  • The computer must be set to boot from the CD
  • Gently tap F12 and choose to boot from the CD
  • Follow the prompts
  • A Welcome to xPUD screen will appear
  • Press File
  • Expand mnt
  • sda1,2...usually corresponds to your HDD
  • sdb1 is likely your USB
  • Click on the folder that represents your USB drive (sdb1 ?)
  • Press Tool at the top
  • Choose Open Terminal
  • Type the following and press enter:

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

  • Press Enter
  • After it has finished a file will be located on your USB drive named mbr.bin
  • Remove the USB drive and insert it back in your working computer and navigate to mbr.bin, zip it up and attach it to your next reply.

This will allow me to have a look at the MasterBootRecord of your drive and see if it is infected.

regards, Elise


"Now faith is the substance of things hoped for, the evidence of things not seen."

 

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#3 Elise

Elise

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Posted 23 February 2011 - 06:29 AM

Due to the lack of feedback, this topic is now closed.In the event you still have problems, please send me or any Moderator a Private Message and ask them to reopen this topic within the next 5 days.

regards, Elise


"Now faith is the substance of things hoped for, the evidence of things not seen."

 

Follow BleepingComputer on: Facebook | Twitter | Google+ | lockerdome

 

Malware analyst @ Emsisoft





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