0x000000CB is a driver and device stop code result. This indicates that a driver or the I/O manager failed to release locked pages after an I/O operation.
Code reference and safe checks
Read the exact screen and operation before selecting a repair. This page does not run commands or collect files, keys or logs.
What this value means
This indicates that a driver or the I/O manager failed to release locked pages after an I/O operation.
DRIVER_LEFT_LOCKED_PAGES_IN_PROCESS identifies a stop-code family. The four bug-check parameters and dump, if available, help distinguish the actual failure path.
| Code | 0x000000CB |
|---|---|
| Short hex form | 0xCB |
| Symbol | DRIVER_LEFT_LOCKED_PAGES_IN_PROCESS |
| Windows family | Blue screen and stop codes |
| Source level | Microsoft bug-check page |
The linked debugger page also describes its parameters: For more information about memory descriptor list, see the following topics:
Safe next steps
- For 0x000000CB (DRIVER_LEFT_LOCKED_PAGES_IN_PROCESS), record the stop code, four parameters if available, and the driver file shown on screen or in the dump.
- If Windows starts, compare recently changed drivers with the exact PC or device maker’s support page. Use Safe Mode only if normal startup fails.
- A named module may be where Windows stopped, not the proven root cause. Avoid broad driver removal.
After one step, repeat the original operation and record whether this same code returns. A different code needs a fresh interpretation.
What this code cannot prove
The source establishes the identifier and reference meaning. It does not establish the cause on your specific PC.
If Windows no longer starts or the issue repeats with hardware warnings, protect files and use manufacturer or qualified support.
Official reference and verification
Source type: Microsoft bug-check page. Checked against the source set on Nov 2, 2026.
The reference gives the meaning of this identifier. It does not inspect your PC or guarantee that one repair will work.