Laptop hangs up at Classpnp.sys file.

Anonymous

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!!!

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Anonymous

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

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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135 additional answers

Anonymous

2010-12-10T19:22:56+00:00

I think you're right on with a correlation with Adobe. My computer was freezing all the time when using anything with CS3. I ignored the update as well and now I'm sunk. I will update Adobe as soon I can get up and running. Also, I've read that others are seeing correlation with Bluetooth. I reinstalled my bluetooth driver due to an Error 43 issue and now I can't boot up.

Thanks for posting the Adobe reference. Hpefully once I'm back up and running it won't freeze and bog my entire system down!
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Anonymous

2010-12-03T23:49:31+00:00

After a couple of days with this issue, and testing multiple scenarios from this thread and others, I finally figured it out. Below is what fixed it for me.

Unplug laptop power cable

take out battery

Unplug CMOS battery for a few minutes.

Plug in CMOS battery and plug in power cable --> Boot up works great.

Connect battery again, all is still working as expected.

Hope this helps!
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Anonymous

2010-11-26T17:56:37+00:00

I hit this problem and had tried everything I could find over the last couple of days. It was frustrating because windows would always hang so I could not access the disk. I even loaded my Suse Linux boot CD but I could not access the HD. Eventually I found out about <ALT-F10> (just keep hitting it after powering up the system). I was presented with a Boot Options page. It had a line in it that said "/NOEXECUTE=OPTION/MININT". I hit the <delete key> to remove this text and hit <ENTER>. The system rebooted, got to the "Starting Windows" message (where it would always hang), continued, did a disk check and then came up so I could login. Hope this helps somebody. It appears the solution to this problem varies by system. If there are any Windows Geeks out there, I would love to know the details of what actually happened. Thanks.
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