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Windows 7: Classpnp.sys Problem among others

08 Nov 2011   #1

Windows 7 Ultimate x64
Classpnp.sys Problem among others

Hi, I am new here although I have been reading the forum and always found the answers in others' situations, until now.

I am not an expert but I will try to explain what happens and what I tried to do so far.

It is a Pentium Dual Core E2220 2.2ghz, MB MSI P6NGM-L, HDD WD 160GB, 1x2GB RAM Kingston, with Windows 7 Ultimate x64 as OS.

So... to begin, when trying to run Windows the system crashed consequently with no BSOD, or sometimes with the black screen known for 0xc0000428 "digital signature verify‎". Tried disabling the usage of firmware but didnt work. I went into safe mode with the loading stucked at classpnp.sys and the system crashing.

Then, tried the startup recovery option with no luck either. After, tried startup recovery and to recover a previous state of windows with the original DVD and nothing. When I was decided to make a format and reinstall windows from the dvd I started to get BSOD when trying to boot from the dvd. The Bsod were
"page_fault_in_nonpaged_area" STOP 0x00000050
"irql_not_less_or_equal" 0x00000000A
"cache_manager" 0x00000034
and 0x00000007e

So, as I was unable to boot into any kind of windows to get the minidump files I tried other stuff. First, put the HDD in a computer with the same MB and configuration to realize that the HDD and the Windows worked fine, with no crashes. Here I made an upgrade install from the Windows DVD and updated the graphics drivers. Changed back the HDD and still the same. So, I tried puting the "healthy" HDD on the problematic computer to get the same system failures.

As I read that this has somethign to do with BIOS, I flashed and udpated the MB BIOS from DOS with a usb-bootable-disk. But I still get the same classpnp.sys stuck in safe mode and the system just crashing when booting windows normally.

I can not acces windows by any means on this computer, I can only access it from the other computer but can not solve the problem with this one. I dont know what else to do, so please.. help.

Thanks in advance for any answer.

My System SpecsSystem Spec

09 Nov 2011   #2

Windows 7 Ultimate x64

I can try getting the minidump folder from the hdd when I use it in the other computer, would that be helpful?
My System SpecsSystem Spec
10 Nov 2011   #3

Windows 7 Ultimate x64

any help please?
My System SpecsSystem Spec


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