What is BSOD-fltmgr.sys?
BSOD-fltmgr.sys shows up as a critical-severity system driver fault. Windows has terminated due to a fatal error in the fltmgr.sys kernel module. Common triggers are outdated or faulty driver, hardware incompatibility and conflict with antivirus. Work through the steps below in order.
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- Outdated or faulty driver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
Most reports of BSOD-fltmgr.sys clear up after Update the driver in Safe Mode, so it's worth trying before anything more involved.
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2
Return the driver to the previous version (Rollback)
Persistent cases usually stem from less common drivers instability factors, which the following steps are built to catch.
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3
Check the logs in Event Viewer
For lingering BSOD-fltmgr.sys cases, "Check the logs in Event Viewer" is worth running through.
Commands & Diagnostics
verifier /standard /all
bcdedit /set safeboot minimal
Frequently Asked Questions
BSOD-fltmgr.sys is most often triggered by outdated or faulty driver. Other reports point to hardware incompatibility and conflict with antivirus as contributing factors.
Most BSOD-fltmgr.sys reports resolve after "Update the driver in Safe Mode". The rest of the guide above is there for the cases that don't.
BSOD-fltmgr.sys is rated critical severity in our database. It's worth acting on quickly rather than letting it recur.
You shouldn't need to. Work through the guide above first — a reinstall is only worth considering if none of those steps help.
Sometimes. Microsoft regularly releases patches that fix known BSOD triggers including BSOD-fltmgr.sys. Make sure Windows is fully up to date via Settings → Windows Update before attempting more advanced fixes.
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