Blue screen at classpnp.sys - Page 2

Nabutso

351 Posts

February 27 2012 23:43 GMT

#21

I must be doing something wrong or using the wrong files because I can't even run memtest off a usb.

I have tried using the boot folder itself.
I have tried using the iso.
I have tried using just the contents of the boot folder.

Nothing is running memtest. I swear, I am not bad with computers.

jaj22

United Kingdom1376 Posts

February 27 2012 23:47 GMT

#22

If you want to run memtest from a USB stick, you'll need to use the auto-installer for USB keys from here:
http://www.memtest.org/#downiso

Tanukki

Finland579 Posts

February 28 2012 00:59 GMT

#23

A difficult problem. I agree it's a driver/registry corruption, and the usual fix would be to do system repair, then restore to an earlier point. But you can't get to the repair part even using a boot disc.

What I'd do is try fiddling with my hardware and BIOS settings until I'd have my fill. (maybe CPI APIC support, Plug and Play OS) And if I still couldn't boot to the windows disc to repair the system, I would make a non-win7 boot option, use that to save any vital data, nuke the hard drive, then install again from scratch.

Nabutso

351 Posts

February 28 2012 01:18 GMT

#24

I ran 3 passes of memtest and there were no errors.

I'm starting to suspect my sata ports on my motherboard. Unfortunately ALL of them seem to bring about this bsod.

memtest wouldn;t work through my cd drive, and neither my ssd or any hdds work either.

Nabutso

351 Posts

February 28 2012 05:30 GMT

#25

Sorry to double post again but I'm at a total loss now.

No memtest errors with many passes done, reseated everything, tried every sata port, tried every boot cd I have (xp, w7 32bit, w7 64bit). I feel like the problem is my sata controller but I have no way to fix that, do I?

Nabutso

351 Posts

March 02 2012 01:54 GMT

#26

I'd like to update the status of this.

I've tried a new mobo, still gets the same error.

I went and bought a new stick of DDR3 aswell, same error.

The only thing it can possibly still be is the PSU or the CPU, as those are the only parts that have been in each one of these tests.

Is it possible for it to crash at an EXACT SAME POINT due to the PSU? I don't think so...

The last possible option then is the CPU... but it works fine if I boot into linux from my usb.

Edit: strange update.

I just disabled both hyperthreading and limited my cpu to 1 core and it booted fine.

edit#2: it seems my cpu can't boot into windows unless I have 3 of it's cores disabled.

mat.mich

Poland3 Posts

August 16 2012 22:49 GMT

#27

On March 02 2012 10:54 Nabutso wrote:

I just disabled both hyperthreading and limited my cpu to 1 core and it booted fine.

and how did u do that? in bios?

Nabutso

351 Posts

August 16 2012 23:24 GMT

#28

On August 17 2012 07:49 mat.mich wrote:

Show nested quote +