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
    2012-03-13T14:47:45+00:00

    I had exactly the same problem, Windows 7 was running fine ( idndt had new hardware added, neither used an external USB disk) and it simply started freezing in windows boot logo, when running in safe mode if freezed when loading CLASSPNP.SYS.

    I did a new fresh isntall and it installed fine, but when it boot it then freezes again!

    So i went to the store where i bought the notebook to see whats was wrong, they even put a new HD and they installed the Windows 7 i had, and voilá, the problem continued existing with a new HD, so they installed a Windows 7 original and finally it all went fine :)

    So the problem seams to be caused by some drivers or updates that are added to those Windows 7 AIO compilations that isnt compatible with all hardware.

    Stop installing windows compilations and try to get an original Windows .iso like i did and youll have it running smoothly...

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  2. Anonymous
    2012-03-14T01:29:04+00:00

    Removing and inserting HDD back on Dell Studio 1557 helped me.

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  3. Anonymous
    2012-03-21T01:11:33+00:00

    That concept is available, it's called pay for support. Mac charges almost 400 for theirs.

    P.S.

    It's not a new concept at all

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