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ejdrijin's Avatar
ejdrijin ejdrijin is offline
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Join Date: Jul 2011
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13-Sep-2011, 04:44 AM #1
classpnp.sys
Hi,

I am having trouble in booting Windows 7.

When i try to boot up with Safe mode, it hangs up on classpnp.sys. After 20mins it continues and doesnt go in to safe mode.
It loads windows 7 but it would be extremely extremely and extremely slow!!

What could be this is it a driver problem???

How can I solve this issue???

Thanks
Cheeseball81's Avatar
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Moderator & Malware Removal Specialist with 83,433 posts.
 
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Location: Long Island, NY
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13-Sep-2011, 12:49 PM #2
This seems to be a common problem.

I just read through 7 pages here (all different suggestions and different ones worked for everyone) http://answers.microsoft.com/en-us/w...2d2edc0?page=7

Most people had success by going into the BIOS and changing the disk mode from AHCI to IDE.

What brand computer is this?
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ejdrijin's Avatar
ejdrijin ejdrijin is offline
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13-Sep-2011, 01:04 PM #3
Its a lenova... i will give it a check tomorrow as the laptop is not here... thanks mate... hope i will get the good answer!!
Cheeseball81's Avatar
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Moderator & Malware Removal Specialist with 83,433 posts.
 
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13-Sep-2011, 01:07 PM #4
You're welcome. I hope it helps. That thread had many suggestions. Good luck, keep us posted.
Snagglegaster's Avatar
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13-Sep-2011, 02:34 PM #5
Quote:
Originally Posted by ejdrijin View Post
Hi,

I am having trouble in booting Windows 7.

When i try to boot up with Safe mode, it hangs up on classpnp.sys. After 20mins it continues and doesnt go in to safe mode.
It loads windows 7 but it would be extremely extremely and extremely slow!!

What could be this is it a driver problem???

How can I solve this issue???

Thanks
You can pretty much take it as written in stone that your system has a malware infection(s). A system that runs like crap in standard mode and won't boot into Safe Mode is a textbook case.

The classpnp.sys issue is really a red herring for the underlying cause of the issue. When you boot Windows in Safe Mode, it reports the last driver successfully loaded. That means whatever interferes with loading Windows in Safe Mode is something altogether different. I could tell you how to enable boot logging to see where Windows actually hangs, and I could suggest trying a System Restore, but I think this would all be a waste of time and energy because I see similar behavior all too often and it's normally due to malware. The most practical advice I can give you is to report your thread to a moderator and ask that it be moved over to Malware Removal.

Last edited by Snagglegaster; 13-Sep-2011 at 10:58 PM..
ejdrijin's Avatar
ejdrijin ejdrijin is offline
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14-Sep-2011, 03:23 AM #6
how u can you do malware removal??? thanks
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