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Windows 7: Stuck on Windows splash screen, safe mode stuck on classpnp.sys

02 Sep 2013   #1
Tomb27

Windows 7 x64 Professional
 
 
Stuck on Windows splash screen, safe mode stuck on classpnp.sys

After a power outage 3 weeks ago I was having issues with the system going down at around 5 minutes and then less and less time after that. I was told it was a display issue and to uninstall and reinstall my display drivers. I uninstalled my drivers and it was still the same. I felt like it was temperature related. I found my graphics card (Radeon 5700) was dirty. I cleaned it and thought I was back in business. Everything was back to normal, all I needed to do was update my graphics drivers. Once that was done, my computer would no longer load past the Windows splash screen.

I used Puppy Linux on a flash drive and I have access to everything. I can use the internet and access all my files. This to me says that it is not a hardware issue.

The fact that when I try to go into safe mode it gets stuck for more than a day on classpnp.sys (when I finally give up). I understand that classpnp.sys has loaded but, there is something after that that the computer can't load. I have seen some people have atipcie.sys load after classpnp.sys and it makes sense to me that it would be a graphics driver that is causing the issue.

I need my Windows 7 up and running for school and work projects. Any ideas, thoughts, or help would be greatly appreciated.


My System SpecsSystem Spec
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02 Sep 2013   #2
YoYo155

Windows 10
 
 

Hi ,
Follow this tutorial to run SFC /Scannow at boot.
If you want to run the command from a USB drive follow this tutorial.
And apply it to the first link instead of the ERD (Emergency Repair CD).

Generally a good tutorial to read.
My System SpecsSystem Spec
03 Sep 2013   #3
Tomb27

Windows 7 x64 Professional
 
 

SOLVED
THREE WEEKS without my computer! Occam's Razor... not Murphy's Law in this case

In my hardware and operating systems class I was told that Last Known Good Configuration was ONLY use able if it was the FIRST thing you tried after a crash or mishap. On a whim I gave it a shot and sure enough I'm in and working all the scans. Both scf /scannow and chkdsk came up with 0 errors/issues. If you can think of any other scans to run let me know.

In my case this boiled down to a power outage that triggered a temperature issue caused by a dirty graphics card.
My System SpecsSystem Spec
.

03 Sep 2013   #4
YoYo155

Windows 10
 
 

Awesome .
But I don't understand the reasoning behind the cause, sorry what did you mean?
Quote:
In my case this boiled down to a power outage that triggered a temperature issue caused by a dirty graphics card.
My System SpecsSystem Spec
03 Sep 2013   #5
Tomb27

Windows 7 x64 Professional
 
 

The power went out as it so often does here in Florida. When the computer was restarted it began to shut the monitors off at 5-7 minutes. When restarted the computer would shut the monitors off at shorter and shorter intervals. Lets say I turned it on and the monitor said no signal monitor going to sleep at 7 minutes in. I would then shut the computer off at the power switch and restart it. This time the monitor would go to sleep at 5 minutes. I would repeat the process until I was left with less than 2 minutes which wasn't enough time to finish booting. I would then let the computer completely cool off. I cleaned the computer inside, neglecting the ATI Radeon 5770 graphics card because I knew nothing about it. I was still stuck with the monitor going to sleep. For a few days I worked and worked at trying to do something to diagnose the situation in the limited time frame I had but I was unable to. I was also unable to find anything online in any forum to help me understand what was going on. It seemed to me to be temperature related but I couldn't check that do to time constraints before the monitor went to sleep. My friend got me a new motherboard but I refused to put it in because I just felt that wasn't the issue.

Finally, I took the graphics card out. It was quite dirty. I cleaned it and reinstalled it. For a moment everything fine, until I used the Dell website to reinstall the drivers. I only installed the critical/urgent one and then my system hung on the Windows Splash Screen. I tried Safe Mode, that hung on what ever was loading after CLASSPNP.SYS. I let both hang for a day each just to see if I was being impatient.

Then I plugged a USB with Live Puppy Linux and everything was there and ok. This to me was more evidence that it wasn't the motherboard but perhaps a driver issue.

After days of scouring forums trying to find someone who not only had the problem I had, but fixed it before adding my own post and getting scolded I decided to try using Last Known Good Configuration. I have to say I was PLEASANTLY surprised when it worked and I updated my graphic drivers (all of them) as soon as possible. Now everything is back as it was before the power outage.

Did I explain it well enough? I hope this helps someone who like me was stuck without an answer.
My System SpecsSystem Spec
03 Sep 2013   #6
YoYo155

Windows 10
 
 

Quite well thank you .
My System SpecsSystem Spec
03 Jun 2014   #7
TmxPro

Windows 7 Ultimate x64
 
 

I had same problem after power failure. I have costum built pc with msi mobo. I got it work after going to bios(DELETE key) and changing it to fail safe defaults.
My System SpecsSystem Spec
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 Stuck on Windows splash screen, safe mode stuck on classpnp.sys




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