Windows 7 won't boot / Safe Mode hangs on Classpnp.sys Solved

Question

Hello everyone.

I installed Windows 7 Pack 1 on my new laptop twenty days ago (legal version with unique CD key; Windows downloaded from my university's Microsoft Store, installed on USB stick, then installed on the laptop)

Everything was fine... until today.

1- The computer started up normally, Windows 7 loaded until "Starting Windows..." with the colored Windows screen that loads, loads, loads... for nothing

2- I reboot the computer and it offers me "Launch the system recovery tool (recommended)" or "Start Windows normally". So I choose to start Windows normally: again the infinite loading of Windows...

3- I reboot the computer and this time accept to launch the system recovery tool: "Windows is loading files", then I see a second later the "Windows bar" appear and then disappear immediately... Then nothing. Black screen.

4- I reboot the computer and press F8 to launch in Safe Mode... It lists a bunch of files loaded from system32/drivers, until it gets to "Classpnp.sys". Then it writes "Please Wait", and nothing happens after that.................

Note: I also tried to ask the BIOS to launch my USB stick with W7, and to do "Repair"... But once this was requested, nothing happens....

Help please :(

I will need it for studying very soon, and it's stressing me out a lot...

Thanks in advance to anyone who can try to help me!

Fizzzzz · Accepted Answer

Hello Scarpa, and thank you for your interest in my problem!

When I press F8, several options appear:

- Repair your computer
- Safe Mode
- Safe Mode with Networking
- Safe Mode Command Prompt

* Regarding the Repair, I had tried "Repair your computer" from this menu... but I get a black screen.

* As for "Safe Mode Command Prompt", the result is the same as "Safe Mode":

The computer loads a lot of files from: "Windows\system32\drivers\"

Then it finally loads "Windows\system32\drivers\Classpnp.sys" and tells me "Please Wait" for five minutes... then a blue screen appears for 2 seconds.

The laptop then restarts and offers me "Launch Startup Repair (recommended)" or "Start Windows Normally".

Scarpa · Answer

Hello.  When you say "Repair", you mean Startup Repair, right?  It is possible that the BCD (Boot Configuration Data) is corrupted, choose  Command Prompt, then type this:  bootrec /rebuildbcd

Fizzzzz · Answer

Just to clarify, I haven't downloaded/installed anything yesterday...

Scarpa · Answer

No, it is the command prompt launched from the USB key.

Fizzzzz · Answer

(I’m afraid I didn’t understand what you asked me to do Scarpa, so I will detail what I have undertaken)

When I ask the computer to boot from the USB drive with W7 first, I arrive at this screen:
https://www.dedoimedo.com/images/computers_new_1/windows-7-install-now.jpg

Is it from here that I can access the Command Prompt? Because I’m trying the Windows key and Ctrl Alt Del, but nothing...

For my part, I then click “Repair your computer” and arrive at this background screen:
http://www.weesk.com/wallpaper/informatique/windows-7/windows-seven-windows-7-informatique.jpg

And from there, nothing happens... I can move my mouse, but nothing occurs... The USB drive isn’t blinking (although it does when it’s working, and it did during the first 5 seconds when the repair screen launched)

Scarpa · Answer

I see that your Windows is in English, there should normally be this kind of menu:

Startup Repair
System Restore
System Image Recovery
Windows Memory Diagnostic
Command Prompt

This Windows doesn't seem very legit.

Fizzzzz · Answer

I have, however, used the official W7 64-bit English ISO
I mounted it on my USB stick with the Windows 7 USB/DVD download tool,
And used the CD-Key that was provided to me by the Microsoft Campus Program.

I am therefore surprised that there is not everything...

What should I do then?

Fizzzzz · Answer

For your information,

I downloaded the ISO here (which provides the direct link to Microsoft):
hxxp://www.winmacsofts.com/telecharger-limage-iso-de-windows-7-depuis-le-site-de-microsoft/

And I used the Windows 7 download tool here:
http://www.microsoftstore.com/store/msusa/html/pbPage.Help_Win7_usbdvd_dwnTool

Edit moderation CCM: the winmacsofts link has been disabled as it now leads to malware.

Fizzzzz · Answer

Hello again,

It's quite surprising, but after waiting 10 minutes after clicking on Repair your Computer, a "System Recovery Options" window opens.
http://image.noelshack.com/fichiers/2013/37/1378827840-img-4778.jpg

"Use recovery tools that can help fix problems starting Windows" didn't work, so I tried "Restore your computer using a system image that you created earlier"...... But it can't find my External Hard Drive, even though it finds the same External Hard Drive when I select "Load Drivers" (but it can't load them)....

-> In short, I clicked Cancel, and then I ended up on the famous Startup Repair page!
http://image.noelshack.com/fichiers/2013/37/1378827767-img-4780.jpg

As you indicated, I clicked on Command Prompt and typed bootrec /rebuildbcd

I received the following result:
http://image.noelshack.com/fichiers/2013/37/1378827766-img-4787.jpg

Total identified Windows installations: 0

What should I do now?

Thanks again :)

Fizzzzz · Answer

(Sorry to repost...)

But that reminds me that I have "two partitions".

One that is 1 GB (L I think), and the real one (D I believe) that I use which is 999 GB.

When I'm in the BIOS, it only shows me the "Hard Drive".

Could there be a conflict?

Scarpa · Answer

It's easy to find out.  Type c: dir  d: dir

Optimistikman · Answer

Good evening,

My mother has exactly the same problem. Can you please help me?

I just arrived at her place and I'm discovering the problem that my sister explained to me over the phone on Tuesday.
I'm spending the weekend with her and I admit that I don't know how to fix this issue.
It's exactly the same in every way, the only difference being that my mother hasn't made the recovery CDs for the PC, so reinstalling Windows 7 is going to be tough!
Furthermore, she has photos that she cares a lot about. I don't know how to recover them for her...

Can you please help me? She's retired and her computer is vital for her.
On Tuesday, she was crying so much about her PC that she asked my sister to take her to buy another one (but with her retirement of €900, I'd like to spare her such an expense).

Thank you in advance for your help.

ikewdu · Answer

Hi,

Since you’re at the command line, try the following.

diskpart
list volume (note the letter of your Windows, let's assume it's c.)
exit

chkdsk c: /f /r (this scans and repairs defective sectors)
rstrui.exe (this launches the restore points, choose one from a week ago)
sfc /scannow (if the command works, it replaces the faulty system files)

bootrec /fixboot (it doesn’t hurt to repair the boot)

If it’s still not working, we’ll take a closer look at the hard drive.

@optimisitkman: open a thread.

optimistikman · Answer

How do I access the commands?

Nekkin · Answer

I solved my problem thanks to Windows' help and support:

Control Panel >> System >> Advanced System Settings >> Startup and Recovery >> Settings >> under System Failure, there is a command called "Write debugging information" >> choose "Complete memory dump" >>> then OK >> OK

;)

kido · Answer

Hello, I have the same problem since this afternoon and I don't understand the steps to follow, but I waited 6 months to be able to update and restart my new PC due to other issues, and now it has been working perfectly for a week. But today, I changed my monitor to work on another screen and now there's a problem. My PC is slow, I restart it, but it can't get past the Windows startup logo, and startup repair doesn't work, getting stuck on Classpnp.sys.

Windows 7 won't boot / Safe Mode hangs on Classpnp.sys

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