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Is there a boot killing, windows hiding virus?


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#1 xenoss

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Posted 01 October 2009 - 08:40 AM

I've posted this issue in the XP section (I suspected it to be XP related). But I would like to confirm with the virus experts in this section of the forums, just to make sure I am (or am not) dealing with a virus here. So I can continue with solving my problem. i'll try to keep it short and to the point.

Bried descrption: PC functioned well as usual. During net browsing last night, pop ups, close it down, I get system loading noises as if on heavy load (like when desktops loads). a few seconds later, BSoD.

After that, if I try:
Boot to XP (sp2) normally: BSoD during Windows logo. 0x0A.
Boot to safemode: fails during dos style screen as it loads files. BSoD. 0x7B
Boot to safemode command prompt: same as above.

Run recovery console from CD: "1: Windows" doesnt show, suggesting the windows installation wasn't found.
As a result, chkdsk, bootcfg, fixmbr etc are unusable.

HDD passed diagnosis long test 100%.

I am assuming some sort of virus messed up windows, messed up boot. So while the hdd is fine, recovery console cant see it, cant boot, cant do anything.

The thing is, though I've had to deal with several virus infections before, this seems a bit scary to be 1 of those virii you get browsing the net. (usually the nasty things require running a file, opening email, and the likes). Did nothing of the sort.

In your experience, is the problem I'm looking at a virus? I did some search and there seems to be stuff that kills safemode. But here, everything's down.

Am I looking at a virus?

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#2 quietman7

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Posted 01 October 2009 - 12:06 PM

It can be difficult to determine what exactly caused this problem. Bootup failure can be due to a variety of issues to include application faults, hardware failures, loose pin connections or malware. Startup failures that occur before the OS loader (Ntldr) starts could indicate missing or deleted files, or damage to the hard disk master boot record (MBR), partition table, or boot sector. If a problem occurs during startup, the system might have incompatible software or drivers, incompatible or improperly configured hardware, or corrupted registry/system files. However, the first thing to do is check all your hardware connections and ensure they are fitted properly.

If you cannot bootup or logon in normal or safe mode, then your options are limited. You may be able to use a Windows XP bootable Floppy Disk to boot from a diskette instead of your hard drive. If your hard drive's boot sector or Windows' basic boot files have been corrupted, this disk will circumvent the problem and boot you into Windows. If you don't have an emergency boot floppy, you may be able to use one created on another PC running Windows XP but there's no guarantee that it will boot your machine.Another option is to create a Bootable CD:These are links to Anti-virus vendors that offer free LiveCD or Rescue CD utilities that are used to boot from for repair of unbootable and damaged systems, rescue data, scan the system for virus infections. Burn it as an image to a disk to get a bootable CD. All (except Avira) are in the ISO Image file format. Avira uses an EXE that has built-in CD burning capability.If you are not sure how to burn an image, please read How to write a CD/DVD image or ISO. If you need a FREE utility to burn the ISO image, download and use ImgBurn.

Note: In order to use a rescue disk, the boot order must be set to start from the CD-ROM drive. If the CD is not first in the boot order, the computer will attempt to start normally by booting from the hard drive. The boot order is a setting found in the computerís BIOS which runs when it is first powered on. This setting controls the order that the BIOS uses to look for a boot device from which to load the operating system. The default will normally be A:, C:, CD-ROM. Different computers have different ways to enter the BIOS. If you're not sure how to do this, refer to:If at some point, you are able to boot up but have difficulty running programs, you can try using the VIPRE Rescue Program - the size of the downloaded application is large. This is a utility designed to scan and clean a computer which is so badly infected that most programs cannot run. Virus definitions are included and the program is self-running once executed. All scans include Rootkit Detection. Be sure to print out and follow the instructions provided on the same page for running under Windows or with the Command Line option from Safe Mode with Command Prompt.

Edited by quietman7, 01 October 2009 - 12:07 PM.

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