Laptop hangs up at Classpnp.sys file.

Anonymous
2009-10-30T12:33:24+00:00

So I installed Windows 7 the other night on my laptop.  I did the driver updates and installed Norton.  I also installed Office 2007.  Then I shut it down for the night.  The next day I turned it back on to install a few more things.  A friend recommended that I install Ad-Aware, so I did, and ran it.  I've used it on a few of my machines before with no problems.  I installed a couple more programs (SANDRA & CPU-ID) then I shut it down for the night.  It stalled on shutdown.  I didn't think anything about it and after about 20 minutes I did the power-off.  I started it up the next day and it now hangs at the starting windows screen.  I've tried the following with all the same results:

  • System repair - hangs at the repair screen
  • Start normally - hangs at the starting windows screen
  • Start in safe mode - hangs at the classpnp.sys file
  • Start in safe mode with command prompt - hangs at the classpnp.sys file
  • start in safe mode with networking - hangs at the classpnp.sys file

I've even tried to put in the windows 7 disc back in to do a re-install and it hangs at the starting windows screen.

It seems like no matter what I try I get the hang up at the windows starting screen.

Someone help, please!!!

Windows for home | Previous Windows versions | Windows update

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Anonymous
2009-11-08T15:10:27+00:00

So the other night I tried a few more things with all the same results.  Here's what I tried:

  • I bought a second gig of ram, so I tried swopping out one stick, then the other - same results.
  • I bought a hard drive enclosure, removed the hard drive, formatted it with another computer, made sure I could save things to it, re-installed hard drive, booted from CD - same results.
  • I bought a brand new hard drive, installed it, booted from CD - same results.
  • Put old hard drive back in with both sticks of ram - same results.

After reviewing a few things, I found that when Windows gets to the "Starting Windows" screen, it's checking your hardware to make sure that things are OK.  Well, my hard drive, RAM, CD Drive, and Video Card are OK (I get all the right video stuff), so there's only a couple of things left, and one is the motherboard.  So, I believe that there is a hardware issue that is not allowing Win7 to completely load.

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Anonymous
2010-12-13T17:26:25+00:00

Go into your bios and check the hard drive configuration.   Once I reverted back to IDE the system booted as normal.  You may have to do the opposite!!!

At all times my system hung at classpnp.sys as advertised.  Let me know if this fixed

Macbionik.com

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  1. Anonymous
    2012-01-16T15:14:27+00:00

    I has exactly the same problem as in the first post. Nothing helped (runing bootsect, taking out bios battery, boot via cd/dvd/usb, changing classpnp).

    My solution: replace RAM, after that windows couldn't load, I lost the system partition but I could run the installer. The other partitions (softwares, personal files) were OK.

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  2. Anonymous
    2012-01-04T23:56:44+00:00

    Hey everybody. I had the same problem as all of you with windows not loading, stopping at classpnp.sys when i did the safe mode boot. My problems started when i installed an creative x-fi audio card, and installing its drivers. After this, my windows would not load, so I solely blame Creative for this stupid issue. I have a z68a-gd 65 (g3) mainboard, and i solved this problem after hours of testing different stuff, all that were written in the first two pages in this forum, but my solution was: Update the bios driver! :) After I did that, windows booted :) And now I am gonna throw that creative **** in the garbage after hitting it with an axe. Do not buy this <removed> soundcard, ever. Good luck to the rest of you.

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  3. Anonymous
    2011-12-15T10:13:51+00:00

    Dena,

    First, I'd like to thank you for all your help on this ongoing issue.

    Unfortunately the system recovery did not resolve the issue, at all.

    Nor has any of the resolutions the other kind people have provided in this thread...

    The worst of the problem with all of this, is the inability to access my data on the primary partition - none of the options available allowed access to the dos prompt (i couldn't get past that file during boot to get there), nor could i remove the hard drive because i'd lose my warranty with my computer manufacturer.

    Also, they couldn't fix it in time for a presentation I had due. Which, fortunately was on the secondary hard drive.

    I was forced to recover from my original recovery discs i created when i purchased my computer. - and not everyone creates those, because they are not aware they are supposed to.

    As a tech myself, i am surprised that there is not a fix, instead of the band-aid that has been provided, in all this time this issue has been open since 2009.

    I have had zero issues with Windows 7 until this foible occurred, and have had zero success with all the..well..."Hacks" that the other forum members have tried to provide each other - simply because there is no official fix to this. Unfortunately, something like this, really is an OS killer, when said OS is allowed to be easily (or legally) modifiable by the public at large

    My issue came about because I ran a windows update that included, of all things, ONLY the following. a Windows Genuine Advantage update, a Windows Malicious Files update, and nothing else. none of them touched the file in question.

    And yes, this is an official copy of windows - purchased alongside my Toshiba Satellite P500 "lapdesk" as i call it. (this thing is huge!)

    Anyway, i hope this information actually spurs some forward movement by Microsoft (doubtful, it never does) to be more mindful and dutiful to their dedicated users/supporters in the future.

    Maybe, some people will be as lucky as I was, and not lose their data. most probably won't be. That is a fail point by Microsoft for not providing proper support here to fix a simple corrupted driver.

    The next computer I purchase, and all computers I purchase for my customers, will probably use either Linux or Apple - they seem to be more stable and able to adapt to failuressuch as this.

    Please pass this on to the people who actually take proper stock in messages such as this, for the upcoming windows 8 - maybe it will do some good. or maybe not.

    UPDATE:

    I have had no choice but to move forward with this faster than anyone could assist, Figured I would update here in case anyone else gets this message.

    I used Hirens Boot CD (current version is 14.1, google it). backed up my data, and then did a full recovery with a nuke and pave.

    There was no choice in this matter, I had to force this quickly due to job restrictions. Unfortunately nobody at my Manufacturer, nor Microsoft, had an acceptable resolution for this situation that did not include a reformat, anyway.

    In short, Unacceptable - After the current project, I will be converting all my PCs to linux (again) and giving up (finally) on Microsoft. I really did think that the Windows 7 project might have turned the company around. I guess I was wrong.

    hi  sys-error i have the same problem as you, can you please tell me if you used the hiren´s boot just to make a back up or also you used it to erase all the content in your HD and then add a whole new OS? thanks in advance

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