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Windows 7: Windows 7 keeps hanging at "Starting Windows"

21 Jun 2009   #11

Windows XP

I just did a startup with logging.

The file says it cannot load 2 files:
  1. c:/windows/system32/serial.sys
  2. c:/windows/system32/ndproxy.sys
Maybe thats of some help?

My System SpecsSystem Spec
21 Jun 2009   #12

Windows 7 32-bit; no 64 coz its a P4 478

Since your machine only support 32-bit, is your Windows 7 disc a 64-bit disc...??? Coz maybe thats the reason of weird things going on... to check the version of the disc, insert the disc to a working computer, check the size of the DVD, if its >3.0 GB, then its 64-bit; if its <2.6 GB its 32-bit.
My System SpecsSystem Spec
21 Jun 2009   #13

Windows XP

No it's a 32bit as well.

About the serials.sys error, at what time in the installation do you have to enter the serials? Cause in the entire installations it doesn't ask for serials. Or is that only asked when windows starts up
My System SpecsSystem Spec

21 Jun 2009   #14

Windows 7 32-bit; no 64 coz its a P4 478

The serial prompt is 1 of the LAST questions the setup will ask... Right b4 u log in for the 1st time...
My System SpecsSystem Spec
21 Jun 2009   #15

Windows XP

Well then the setup doesn't finish.

When it goes for the first time to windows to finish the setup it keeps haning at the windows is starting screen.

With every reboot it keeps there, when I repair it with the dvd it gets to the windows is starting screen and then it just keeps rebooting.
My System SpecsSystem Spec
23 Jun 2009   #16


I have the same problem with my laptop : HP HDX 16 (1150)

I have taken my acronis image and it worked.

Now, the problem is back.

I have no AHCI option in my bios.

My System SpecsSystem Spec
15 Jul 2009   #17

Windows 7

Hello everyone, I just made a new account to post my finding about this problem.

I have been running windows 7 (build 7100) since the release just fine.
Today I booted up my PC to be welcomed by being stuck on the loading screen and a black screen + a white mouse curser when putting in my windows DVD or trying to do a system repair.
After messing around abit with all the different safemodes (they all got stuck on Classpnp.sys) I went into my PC's BIOS. I got a Asus Laptop and my SATA drive was set to "enhanced". I changed it to "compatible" (this is for running windows XP from what I have gathered, since that does not support SATA natively).
With the compatible setting my pc gave me a BSOD immedialty when trying to boot windows, BUT I could get into recovery and windows installation. So I went ahead and formatted my C:\ and reinstalled windows 7 (Build 7100).
My PC seems to work OK now but sometimes it gets stuck on the windows boot screen again.... but I managed to log back into windows a few times now.

So this all has made me think that my problem is hardware related, because its very random at the momemt. I think my HDD might be failing (2 years old), since I also scanned for virusses and could not find anything, registries were ok aswell. Also, when I switch my SATA back to "enhanced", windows will not boot up, another reason I suspect its hardware related.

I hope people with similar problems can get a little help from my post.

PS: I will be buying a new HDD in the next few days and do a clean install and will let everyone here know how that turns out.
My System SpecsSystem Spec
14 Jan 2010   #18

Windows 7 64 bit


I am having this issue as well.

I was running the RC for about 4 months with absolutely no issues and then I started getting stuck at the windows screen, this problem got progressively worse until my machine wouldn't boot at all. Whenever I tried to boot in safe mode I would hang at the classpnp.sys file.

I figured this was a good a time as any to get a legit copy of windows and do a reinstall, so I bought and downloaded windows 7 pro 64 bit upgrade.

I did a complete diagnostic on my velociraptor drive by getting the utility from western digital, no problems came up but to be on the safe side I completely 0'd out my drive before doing the fresh windows install.

This all happened around Christmas. Since I backed up all my files to my laptop I have been using that mostly since then but still using my desktop to play games.

All was fine until yesterday when I started noticing some performance issues on start up, followed by hanging at the windows screen. Now my machine again won't even boot up and when I try to start in safe mode I hang at classpnp.sys

It's an intel machine with an nforce 680i SLI motherboard.

When I google this problem there are about 10 results advising people with the same issue to google it (oh the irony) so if there has been a solution it is not easy to find.

Thanks in advance for any help,
My System SpecsSystem Spec

 Windows 7 keeps hanging at "Starting Windows"

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