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Windows 7: Was working, now hangs at boot

29 May 2009   #31
Dixon Butz

Win7 x64 X2, Win 8.0 x64, Win8.1 x64, Quad Boot

Reset bios to defaults. Then try to install. You have a slight overclock. Have you tested that your OC is 100% stable with Prime95 or Intel Burn in test? It is always advised to install an OS at stock CPU speed.

My System SpecsSystem Spec

29 May 2009   #32

Windows 7 64-bit RC1

I've been through all this multiple times.
Please read the full thread before offering duplicate comments.
To be clear, I have reset the BIOS several times by the various methods, including removing the battery and letting it sit overnight.
None of it seemed to help Win7 boot.
My System SpecsSystem Spec
29 May 2009   #33

Windows 7 64-bit RC1

Quick update:
I decided to try the 32bit version of Win7, and darned if it didn't boot!
So now I have apparently narrowed it down to being a 64-bit issue.
Has anyone heard of certain chipsets or processors having issues running Win7 64-bit?
I know some processors (ie. P4) are not 64-bit compatible, but my Q9450 is, plus I had Win7 64-bit running perfectly for several weeks before this fiasco started.
Any ideas?
My System SpecsSystem Spec

12 Jun 2009   #34

Windows 7 64-bit RC1

So...nothing then?
At least I'm not the only one stumped by this!
My System SpecsSystem Spec
20 Sep 2009   #35

Windows 7

I have the same problem, sort of.....

I have installed Windows 7 on an old (3 years) laptop, it was working like a charm but then it started rebooting on it's own. In a day it wouldn't boot at all. When I tried save mode, it hangs on classpnp.sys.

Now after waiting a long time (15 min.) it does boot, but it starts up in a temporary profile. My DVD drive doesn't work, and the laptop is really slow.
I tried to repair the problem with de dvd, but like I said de dvd drive doesn't work not even on boot, so that's not an option. Antother thing that I find really weird is that Windows says the laptop doesn't have any Ram. But when I look in BIOS it says that I have RAM.

It seems every time I boot the Laptop something else fails.
So it anyone has the solution to this problem, I would be really greatfull.
My System SpecsSystem Spec
20 Sep 2009   #36

Windows 7 64-bit RC1

I'm sorry to hear your having trouble as well.
Mine turned out to be a faulty CPU.
I got it replaced under warranty by intel and now everything works great.
I'm hoping your issue isn't as terminal as mine!
Sorry I can't be of more help.
My System SpecsSystem Spec
12 Mar 2012   #37

Windows 7 Ultimate x64

Quote   Quote: Originally Posted by Elmojo View Post
I've already deleted the windows 7 installation, deleted the partition, reformatted the partition, and even unplugged the drive entirely and plugged in a new physical drive!
Also, I can't launch the installation from within XP, since my XP is 32bit and I'm wanting to install Win7 64bit.
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...
My System SpecsSystem Spec

 Was working, now hangs at boot

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