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| MEMORY_MANAGEMENT | PFN_REFERENCE_COUNT |
PFN_SHARE_COUNT
The PFN_SHARE_COUNT bug check has a value of 0x0000001B.
This bug check code is no longer used by the Windows operating system.
Dump evidence for PFN_SHARE_COUNT
Preserve the complete dump, the four bug-check parameters, the exact Windows build, loaded-module list, and the event timeline immediately before the stop.
Analysis order
- Run WinDbg
!analyze -v, then inspect the documented meaning of each parameter instead of relying only on the probably-caused-by line. - Find the earliest abnormal event preceding the stop: driver update, firmware change, device reset, storage error, verifier report, resource exhaustion, or application hang.
- Keep third-party filter, security, storage, graphics, and virtualization drivers in the module inventory; removing evidence before dump analysis can obscure the responsible path.
Distinctive failure boundary
This result identifies page-frame share-count inconsistency. Examine the PFN database entry, share and reference counts, PTEs that map the page, locked-page activity, DMA buffers, and drivers that map or unmap physical pages.
Separating the result from neighboring bug checks
Memory diagnostics can rule out hardware, but a repeatable stack around page locking or MDL handling strongly suggests a driver accounting error. Preserve the original dump and use the documented parameters and stack to verify this distinction before changing drivers or platform configuration.
References
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