Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: BSOD with System Service Exception, CLASSPNP.SYS

13 Jan 2013   #11

windows 7 ultimate 64 bit

Hey Dave,

All the BSODs that ive had, the error line most commonly visible has been:

other than this one, i have never seen anything specific.

but i have an interesting discovery to share!

My windows finally crashed (due to many BSODs in the last 2 days maybe, or something Internet Download Manager did with my system files, i dono...)

Anyway, i had to install a fresh copy of windows 7.
A friend suggested me to install 32Bit windows 7 Ultimate, but i opted for the 64Bit one...
When windows 7 was installed, i could not find my motherboard drivers disk...
so i had to log on to the website to get the motherboard drivers for my system..
but i had installed MSE first....

i downloaded the VGA drivers from
ASUS - Motherboards- ASUS P8H67-M LE

Intel Graphics Accelerator Driver V8.15.10.2618 for Windows Win7 64bit---(WHQL).
Intel Corporation graphics Driver V8.15.10.2219 for Windows Vista 32/64bit & Win7 32/64bit.

afterwards, while i was updating windows, there was a BSOD with no specific error told...

i had installed ONLY MSE and then the VGA drivers when this BSOD occured..

is there something that can be done regarding this discovery?

Or shud i really try installing 32Bit ultimate windows 7??


My System SpecsSystem Spec
25 Jan 2013   #12

windows 7 ultimate 64 bit

now here it was...

i reinstalled the VGA driver with hotfix provided at the asus website.
then i went to start up menu and had the settings reset to default..
havent had a BSOD eversince...
so for me, i think the causative agent for BSODs, was the settings in BIOS that i had changed while trying to make the 'sata to ide convertor' work for my old IDE hard disk...

thanks a million for all the help guys!
now i will mark it as solved and i hope it stays that way :)

My System SpecsSystem Spec
15 Feb 2015   #13

Windows 7 Ultimate 32bit

HDD controller BIOS settings corrections or boot manager repair?

Hallo, I’m trying to transfer the operating system, due to the lack of space on a SSD, to a HDD and I’m encountering a BSOD.

Print screen BSOD: 0x0000007B (0x80D86B58, 0xC0000034, 0x00000000, 0x0000000A)

Short video sample: start-up to BSOD

It’s an OS back-up image made with Acronis 2013 (Windows 7 Ultimate 32 bit + updates to day) that I’m trying to restore on another PC.

About the hardware it’s a downgrade

Intel Core i5-4440, 3.1 GHz / ASUS H87-PRO / Crucial DDR3 (2 x 4GB) 1600Mhz / Gigabyte Geforce GT 640 2048MB GDDR5 / SSD SAMSUNG SATA3 50GB

Intel Core 2 Duo E6600, 2.40 GHz / ASUS P5LD2-SE / Kingston DDR2 4096 MB / Nvidia Geforce GT 430 / Western Digital Caviar Green 2TB SATA 3 (WD20EARX)

The idea is that the first was BIOS> AHCI (for SSD), while the second is BIOS> SATA (HDD) and I think the restored image contains some BIOS conflict information from the previous PC.

I changed the actual BIOS IDE config > Onboard IDE from “Enhanced” to“Compatible” and I got “No IDE Master HDD Detected” and then NTLDR is missing (booted from the partition with Windows 7, it's a dual boot with XP)

In safe mode drivers load until CLASSPNP.SYS, then blue screen appears for less than a second and then it restarts.

I tried a boot repair through the windows 7 DVD; it has found something wrong but in the end couln’t solved it; Also I tried with command prompt but I think I didn’t input correct choice of lines

Here they say that it would be rather a matter of AHCI / SATA

Any suggestion would be highly appreciated :)
My System SpecsSystem Spec


 BSOD with System Service Exception, CLASSPNP.SYS

Thread Tools

Similar help and support threads
Thread Forum
BSOD from System Service Exception and KMode Exception Not Handled
For a long time now i have been getting BSOD's, pretty much all of the time from System Service Exception and KMode Exception Not Handled. Sometimes the PC never gets to the BSOD and just freezes up and restarts. This happens at any time whether im doing nothing or on the internet, sometimes it...
BSOD Help and Support
BSOD System Service Exception
Hi 7Forums, I hope I can get some assistance on decoding a .dmp log. Some background: I've recently been getting some BSODs, I built my computer roughly three years ago, and clocked it at 4.0ghz with the neccessary volts. I had tested it when I oc'd initially and it was stable in prime for...
BSOD Help and Support
BSOD - Kmode exception and System Service exception
Hi Guys, I'm a composer working on a deadline and have started to experience quite intermittent BSOD's. It appears to happen at higher system loads. I'm reasonably experienced in building custom machines (this is my third on), and so far have never experienced issues with them. This current...
BSOD Help and Support
Bsod's system service exception.
Hi, I keep on getting this error all the time. I tried running your SF Diagnostic tool in Safe mode because I cant get to windows without getting this error. If I am lucky sometimes it loads to Windows but for 10 mins or so and I get this error. Even when I restore to Factory I get this error...
BSOD Help and Support
BSOD system service exception
I had a BSOD and the system is super slow now.I'm attaching the minidump files here... This is what i got from who crashed ur system...Thanx for the quick help.....;) On Tue 12/25/2012 10:56:54 AM GMT your computer crashed crash dump file: C:\Windows\Minidump\122512-21481-01.dmp This was...
BSOD Help and Support

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 03:55.
Twitter Facebook Google+