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
    2012-10-12T12:16:30+00:00

    SO! classpnp.sys.. WOW... tried file check command... memory diag.. and a load of other stuff... finally switched to IDE in bios and it booted up ...horribly... all of my windows personalization was discarded... rebooted and everything seems normal... Im going to do some further testing and will keep posted... the switch to IDE seemed to work but.. i feel lyk that shouldnt be the fix... 

    ROG Asus 990fx

    AMD FX 8120

    16gb Rip Jaws X 2133

    1250 OCZ PSU

    radeon 9970

    1tb Seagate 7200 32mb cache

    Thermaltake LVL 10 GT

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  2. Anonymous
    2012-10-05T21:54:34+00:00

    I experienced exactly same problem last night and recoverd it successfully

    Steps to recover

    1. Launch startup repair and patiently wait until it comes(wait  for atleast 30 min)

    in my case it took 12-15 minutes.

    2.select the language (it was US for me)

    3.A screen will appear with two option.

    1. Select the first option and click next

    5.Open the command prompt option from it.

    1. Give command chkdsk  c:/f

    7.wait for some time.

    8.After completion restart your computer in normal mode and wait patiently .

    you will we able run your windows

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  3. Anonymous
    2012-09-04T18:11:24+00:00

    I probably spent 6 hours trying various methods until I found this method on a thread online. I had tried system restore, shellfix.exe, hard-drive checks, and malware scans. To fix the black screen with cursor after login, I disabled user account control from within safe mode. Upon reboot: no problems!

    Cheers,

    Jojo

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