What is BSOD-classpnp.sys?
Classpnp.sys Driver Critical Error (BSOD) (BSOD-classpnp.sys) is a critical-severity fault affecting the system driver. Windows has terminated due to a fatal error in the classpnp.sys kernel module. It's most often caused by outdated or faulty driver, hardware incompatibility and conflict with antivirus. Use the steps below to track down and fix the cause.
Common Causes
- Outdated or faulty driver
- Hardware incompatibility
- Conflict with antivirus
Step-by-Step Fix Guide
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1
Update the driver in Safe Mode
Start with Update the driver in Safe Mode — it clears the most frequent root cause behind BSOD-classpnp.sys in the majority of cases we've seen.
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2
Return the driver to the previous version (Rollback)
For cases that don't clear up right away, the remaining steps target less typical drivers instability problems.
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3
Check the logs in Event Viewer
Try "Check the logs in Event Viewer" next if the issue persists — it addresses a secondary cause.
Commands & Diagnostics
verifier /standard /all
bcdedit /set safeboot minimal
Frequently Asked Questions
In most cases, outdated or faulty driver is behind BSOD-classpnp.sys. Hardware incompatibility and conflict with antivirus can trigger it too.
"Update the driver in Safe Mode" clears up most BSOD-classpnp.sys reports by itself. The remaining steps above cover what's left.
BSOD-classpnp.sys is rated critical severity in our database. It's worth acting on quickly rather than letting it recur.
In most cases, yes — the guide above resolves BSOD-classpnp.sys without a clean install. Treat a reinstall as the last resort, not the first move.
Sometimes. Microsoft regularly releases patches that fix known BSOD triggers including BSOD-classpnp.sys. Make sure Windows is fully up to date via Settings → Windows Update before attempting more advanced fixes.
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