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MUP_FILE_SYSTEM
Multiple UNC Provider failure for MUP_FILE_SYSTEM
MUP_FILE_SYSTEM is bug check code 0x00000103.
MUP routes UNC path opens to the appropriate network redirector. This bug check is about UNC provider selection and kernel file-system routing, not about a single remote server refusing a connection.
How to read it in a dump
- Look for MUP, SMB redirector, WebDAV redirector, DFS, or third-party network provider drivers on the stack.
- The failing path can be create, referral, provider registration, cancellation, cleanup, or teardown.
- UNC prefix and provider ordering can be relevant.
What to check
- Inspect installed network redirectors and file-system filters.
- Check whether the problem is limited to DFS, SMB, WebDAV, or a third-party provider path.
- Use verifier on redirector/filter drivers only with a controlled reproduction.
References
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