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Can't Boot Windows XP

Posted on 2010-11-29
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Last Modified: 2012-05-10
I'm running Windows XP Pro and I can't boot in safe mode or regular mode.  If I choose to boot normally, the system hangs right away.  If I choose to boot into safe mode, I get stuck on the isapnp.sys file.  I tried restoring isapnp.sys and pciide.sys from the XP OS CD but it still hangs.  I also tried running the XP repair from the XP CD and I also ran chkdsk.  Does anyone have any other suggestions?  
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Question by:LarsArvidson
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by:epichero22
ID: 34235973
If you've run through a repair and it still doesn't boot, probably the safest bet is to backup & reinstall completely.
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by:LarsArvidson
ID: 34235975
That's what I'm trying to get around.  Unfortunately the user (my father in law) has software on this computer that he doesn't have the install key for anymore.  
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by:epichero22
ID: 34235996
Can you contact the vendor to find out if there's a way to extract the key?  Or maybe ask them if they have a record of his purchase and can give you the key that way.
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dbrunton earned 500 total points
ID: 34236003
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by:h_orya
ID: 34236014
Hi,

try to do one of the following and see if it helps you.

Before abything try to make a backup if you can.

1.  try the last known good ......  ( press F8 as soon as your PC starts)
2. try VGA mode only
3. try to do a system restore and go back 1 week or so

last option try to install Windows XP on the top of the existing install


Hope it helps
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by:Michael Dyer
ID: 34236280
Here are instructions on how you can use BartPE to retreive the XP key code from that system so you can reinstall from scratch:  
http://www.windowsreference.com/windows-xp/how-to-retrieve-xp-cd-key/

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by:nobus
ID: 34236854
it can be a bad device, so i suggest :
disconnect all devices not needed for booting: all cd drives, extra disk drives, external devices
remove all add-in pci cards
disable devices from bios : lan, sound..
so you boot with mobo + cpu + ram, video, 1 HDD, keyb + mouse
post results.
you can also test if the hardware is ok by running from a live Knoppix cd  :
ftp://ftp.kernel.org/pub/dist/knoppix/KNOPPIX_V5.0.1CD-2006-06-01-EN.iso
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by:navinmohanta
ID: 34238482
Looks like you have added any hardware recently. Try removing that hardware and restarting the OS.
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Author Closing Comment

by:LarsArvidson
ID: 34252801
There was a 0k .sys file that was preventing the system from booting but now I get a brief bluescreen and the system restarts.
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Expert Comment

by:dbrunton
ID: 34252958
There may well still be a virus or virus remnants floating around.  These are the standard anti-virus applications recommended around here.  Install one at at time and run and see what gets picked up.

MalwareBytes:
http://www.malwarebytes.org/mbam-download.php

ComboFix:
http://www.bleepingcomputer.com/combofix/how-to-use-combofix

HitmanPro:
http://www.surfright.nl/en/hitmanpro

TDSSKiller:
http://support.kaspersky.com/downloads/utils/tdsskiller.zip
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