Question

CLASSPNP.SYS BSOD- an advice needed

Asked by: nsappir

On a client's Hp Pavillion dv6000 after being hit by some viruses I get the above BSOD (zip with dmp files enclosed) most of them are 0x00000000 interpreted by dumpchk as "porbably classpnp.sys".
The BSOD happens when A) I try to start in safe mode!  B) While trying to run programs like "Malwarbytes" or "Combofix".
I tried replacing the memory module to no avail.
I'm not sure weather it is an OS problem or a hardware one.
I need an advice of weather a repair installation can solve this problem or should I try something else first.

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Asked On
2009-08-26 at 06:07:00ID24683049
Tags

windows xp

Topics

Windows XP Operating System

,

Microsoft Windows Operating Systems

,

Microsoft Operating Systems

Participating Experts
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Answers

 

by: pankusareenPosted on 2009-08-26 at 07:40:34ID: 25188166

Try disabling write-behind caching on any removable media drives

 

by: pankusareenPosted on 2009-08-26 at 07:42:13ID: 25188182

And update all ur computer hardware drivers

 

by: pankusareenPosted on 2009-08-26 at 07:43:16ID: 25188194

disabling write-behind caching
Go into My Computer and enter into the properties of you hard drive c:
then HARDWARE TAB
Select your hard drive then hit properties at the bottom of that TAB.
click on DISK PROPERTIES TAB
there will be a chech box that says
"enable write behind cahe"
UNcheck that box

 

by: nsappirPosted on 2009-08-26 at 09:34:51ID: 25189597

No such check box

 

by: pankusareenPosted on 2009-08-26 at 10:19:34ID: 25190013

check this screen shot

 

by: nsappirPosted on 2009-08-26 at 21:21:46ID: 25194571

There is no such check box on that computer. Can it be disabled thru the registry ?

 

by: nsappirPosted on 2009-08-26 at 21:31:27ID: 25194624

The disk is a SATA disk!

 

by: pankusareenPosted on 2009-08-26 at 23:08:50ID: 25195017

No matter whether it is sata or ide .

 

by: nsappirPosted on 2009-08-27 at 07:01:41ID: 25198250

My screen shot

 

by: pankusareenPosted on 2009-08-27 at 08:04:04ID: 25199037

are u using windows xp service pack 3 if not try to update windows xp sp3

 

by: nsappirPosted on 2009-08-27 at 09:47:23ID: 25200254

It's windows home edition with SP3.

Why don't I have on that computer the "Write behind" option

 

by: pankusareenPosted on 2009-08-27 at 10:16:38ID: 25200567

I think may be ur hard disk not support it

 

by: nsappirPosted on 2009-08-27 at 11:12:58ID: 25201070

So back to square one: Is it a hardware problem or a windows one ??

 

by: MeretePosted on 2009-08-28 at 19:39:40ID: 25212802

If you cannot run security scanners  you may still have some malware
Run a scan and save a log hijackthis
http://www.hijackthis.de/
then we progress from there

 

by: rindiPosted on 2009-08-28 at 23:46:06ID: 25213194

Your dump files aren't all pointing to consistent causes, but usually they are drivers. Reinstall your mainboard's drivers, also the drivers for your SATA controller. If that doesn't cleanup the system, boot with the UBCD and run the HD manufacturer's diagnostic utility. If it finds errors, let it repair them.

http://ultimatebootcd.com

After that run a chkdsk /x on all the drive letters on your system. and when that has finished, use sfc /scannow to replace corrupt system files. You will probably need the CD XP was originally installed with.

 

by: nsappirPosted on 2009-09-02 at 22:05:30ID: 25248010

Gave up on this.

Used HP's Recovery systrm to restore.

Computer works fine.

IT WAS WINDOWS AND NOT THE HARDWARE.

20120131-EE-VQP-002

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