Fix CLASSPNP.SYS Blue Screen in Windows 10

A few blue screen errors are easy to handle, and a few are very tough to deal with since they do not allow users to boot into the system. One such case is with:


CLASSPNP.SYS Blue Screen in Windows 10

Classpnp.sys Blue Screen In Windows 10


The causes of this error include corrupt files in the system, interfering hardware, corrupt drivers, and issues with the BiOS.

Since the blue screen error usually occurs soon after Windows 10 loads, we would have to troubleshoot the issue in Safe Mode with networking. Here is the procedure to boot your system in Safe Mode.

Try the following solutions one by one to fix the issue:

1} SFC scan

2} Update your device drivers

3} Update the BiOS of the system

4} Check for hardware corruption

5} Disconnect hardware peripherals

Solution 1] SFC scan

SFC scan helps fix missing or corrupt files in the system. Here’s the procedure for an SFC scan.

Solution 2] Update your device drivers

Usually, all drivers are updated whenever we update Windows. Here’s the procedure to update Windows. However, since we are isolating the possible causes, we would have to update each driver one by one. The procedure to update drivers is as follows:

1] Press Win + R to open the Run window. Type the command devmgmt.msc to open the Device Manager.

2] Right-click and update ALL the drivers one by one.

Update Mouse Drivers In Device Manager


If this procedure sounds difficult, you could use any of the third-party tools available online to help with the same.

Solution 3] Update the BiOS of the system

1] Press Win + R to open the Run window. Type the command msinfo32 and press Enter to open the System Information window.

2] In the right-pane, check the version, date, and manufacturer of the BiOS.

3] Go to the manufacturer’s website and download the latest version of the BiOS.

4] Download the latest BiOS file and install it. Restart the system.

Solution 4] Check for hardware corruption

1] Open File Explorer and go to This PC.

2] Right-click on the system drive (C: in my case) and select Properties.

System Drive Properties


3] Go to the Tools tab and click on Check. It would need administrator permissions.

Tools Check


4] Click on the option Scan drive and let it scan the system drive.

Scan Drive


5] Reboot the system once done.

Solution 5] Disconnect hardware peripherals

One of the causes behind this issue is problematic hardware. Since we have already updated all the drivers, the cause of corrupt drivers has been isolated. Now we might have to do away with the problematic hardware totally.

1] Disconnect all the peripherals except for the ones which are necessary, like keyboard, mouse, etc.

2] Boot the system in normal mode.

3] Try reconnecting the peripherals one by one and check which one gives the issue.

4] We might have to remove or replace the faulty hardware permanently.

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