# Fixing classpnp.sys Stop Code on Windows 10 & 11
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## Introduction
The blue screen of death (BSOD) is a well-known problem for many Windows users. It can occur when you are using a program or application that has a bug, but it’s not always easy to tell which one. This article will help you identify the cause and fix it.
## What is the BSOD?
The blue screen of death (BSOD) is an error message that appears on your screen when Windows has encountered a fatal error. It usually occurs after a system crash, but can also be seen in other situations such as when a program is closing or opening.
## What causes the BSOD?
The BSOD can occur for many reasons:
– A bug in the application
– A hardware problem (e.g. overheating)
– A driver issue
– A memory leak
– An error in a system file
## How to fix it
### Check if the BSOD is caused by an application
1. **Check the Event Viewer** for any errors that may have occurred. If you find any, try restarting the application.
2. **Check Task Manager** for running processes. If there are any suspicious ones, right-click on them and select “End Process” to terminate them.
### Check if the BSOD is caused by a driver
1. **Open Device Manager** and check for any errors (e.g. yellow exclamation marks or red crosses).
2. **Check Windows Update** to see if there are any updates available.
3. **Update your drivers** using the manufacturer’s website or Windows Update.
### Check if the BSOD is caused by overheating
1. **Turn off the computer** and wait for it to cool down.
2. **Check the fan** to make sure that it is working properly.
3. **Check the CPU temperature** using a program like SpeedFan Control or similar. If the temperature is too high, try cleaning the fan.
### Check if the BSOD is caused by a memory leak
1. **Close any open applications** and wait for them to close.
2. **Restart your computer**.
### Check if the BSOD is caused by an error in a system file
1. **Check the Event Viewer** for any errors that may have occurred. If you find any, try restarting Windows.
2. **Check the system file** using a program like System File Checker or similar.
## FAQ
– **Q: What should I do if my computer is running fine after the BSOD?**
– A: Restart your computer and wait for it to boot normally.
Last Updated: December 11, 2025
Tested on: Windows 10 (22H2) & Windows 11 (23H2)