0x000000F5_
Fltmgr File System
Seeing 0x000000F5 on Windows 10/11 means the OS detected "Fltmgr File System". Before reinstalling anything, work through the steps below — the fix is often simpler than it looks.
What Actually Happened
Windows kernel halted due to: the filter manager (used by antivirus/backup filter drivers) detected a fatal condition.
Symptoms
Blue screen appears with stop code FLTMGR_FILE_SYSTEM
Common Causes
- Kernel condition: the filter manager (used by antivirus/backup filter drivers) detected a fatal condition
- Outdated or conflicting third-party driver
- Overheating or failing hardware (RAM/SSD)
How to Fix It
-
01
Boot into Safe Mode and roll back recently installed drivers
-
02
Run memory diagnostic:
mdsched.exe -
03
Run system scan:
sfc /scannow && DISM /Online /Cleanup-Image /RestoreHealth
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Root Cause Breakdown
Stop code FLTMGR_FILE_SYSTEM (0x000000F5) triggered a bugcheck to protect memory integrity.
Should You Worry?
Urgent. Save work frequently to avoid data loss.
Power-User Tip
Check minidump logs in C:\Windows\Minidump to identify the failing .sys file.
Software fix: $0; Hardware replacement: $50�$250