symefasi.sys
Norton / Symantec — Symantec extended file attributes driver
When blamed in a crash: Very likely the true cause
What to do
Symantec/Norton file-system driver — same treatment as srtsp64.sys.
- Update the product; use Norton Remove and Reinstall if crashes persist.
- On managed work machines, report to IT instead.
Official download (the vendor's own site — never use third-party "driver download" sites):
https://support.norton.com/
Got a crash dump? Get your verdict in seconds
Drop the .dmp file into our analyzer — it runs entirely in your browser. No upload, no size limit, no account.
Analyze my dump file →