Windows Stop Code PORT_DRIVER_INTERNAL (0x0000002C): Meaning and Troubleshooting
Quick Answer PORT_DRIVER_INTERNAL is Windows bug check 0x0000002C. Microsoft says it appears very infrequently and recommends WinDbg’s !analyze extension to ...
Quick Answer
PORT_DRIVER_INTERNAL is Windows bug check 0x0000002C. Microsoft says it appears very infrequently and recommends WinDbg’s !analyze extension to help determine the root cause. Its dedicated page does not identify a particular port driver or device, define the four bug-check parameters, or give a code-specific repair. Microsoft Learn
For an actual crash, preserve the memory dump, run !analyze -v, and inspect the call stack to establish which driver and device path were active. The word “port” does not, by itself, mean a USB socket, a serial connector, or a network port has failed.
What Does “Port Driver” Mean Here?
Windows uses drivers arranged in layers to handle device requests. A port driver is a term used for certain drivers that provide common services to other device-specific driver components.
However, Microsoft’s dedicated 0x2C page does not say which port-driver architecture this bug check refers to in a particular crash. Do not translate the symbolic name directly into a diagnosis of a physical connector or a specific class of device. The crash dump must identify the involved modules and operation. Microsoft Learn
Documented Facts at a Glance
| Item | Microsoft’s 0x2C documentation |
|---|---|
| Bug-check value | 0x0000002C |
| Symbolic name | PORT_DRIVER_INTERNAL |
| Frequency | Appears very infrequently. |
| Four parameter meanings | Not provided on the dedicated page. |
| Specific cause | Not provided on the dedicated page. |
| Recommended first debugger step | Use !analyze. |
What Can the Stop Code Tell You?
The name is a lead toward a driver-related investigation, but it cannot establish:
- Which device or port was involved.
- Whether the port driver itself introduced the fault.
- Whether a device-specific driver, another driver layer, or hardware contributed.
- What Arg1–Arg4 represent.
- Which driver update would fix the crash.
A module on the final stack may have detected an invalid condition caused earlier. Follow the call path rather than relying only on the last function or an automated “caused by” label.
How to Investigate an Actual 0x2C Crash
1. Verify the complete code
Confirm that the system reported 0x0000002C as the bug-check value. A number appearing among another bug check’s arguments is not the same thing.
If this entry came from a list of Windows stop codes, there is no particular machine or device to diagnose yet.
2. Preserve the crash dump
Keep the dump created at the time of the failure. A photograph of the blue screen confirms the displayed name, but the dump may contain the stack, loaded modules, and execution context required for investigation.
3. Run the initial WinDbg analysis
Open the dump in WinDbg and enter:
!analyze -vRecord the bug-check value, all four arguments, the stack trace, and any module identified. Microsoft’s dedicated 0x2C page recommends !analyze as an aid to finding the cause. Do not assign fixed meanings to its arguments: the page does not provide a parameter table. Microsoft Learn
4. Inspect the call stack
Display a more detailed stack:
kvIdentify the drivers in the active path. Determine which device or operation they serve and whether the same path appears in other dumps. A repeatable failure during use of a particular device is more informative than the stop-code name by itself.
5. Compare with system history
Note whether the crashes began after a device installation, driver update, firmware change, or Windows update. Review Event Viewer → Windows Logs → System around the crash for related device and driver errors.
A timing match helps prioritize checks, but it does not prove the recently changed component caused the bug check.
6. Apply a targeted fix
If several dumps consistently implicate a third-party driver or device path, check that vendor’s supported driver and firmware updates or rollback guidance. If the stack does not establish a cause, provide the dump and reproduction details to the device vendor or a Windows debugging specialist.
Guidance for Driver Developers
When your driver appears in the relevant path, review the operation shown in the dump and how your component interacts with the surrounding driver layers. Trace request handling, error recovery, completion, cancellation, and cleanup where they are relevant to that stack.
Treat the bug-check arguments as recorded evidence, but do not assert that one is a device object, I/O request, port number, or status code without validating it in the dump. Microsoft’s 0x2C page does not publish those definitions. Microsoft Learn
Guidance for End Users
If the crash repeats:
- Save the crash dumps and note when each failure occurred.
- Record which device was in use, attached, or removed at that time.
- Note recently changed drivers or firmware.
- Use dump analysis to decide which vendor or component to investigate.
There is no Microsoft-documented reason to disable every USB port, change network port settings, or replace hardware solely because the stop-code name contains “PORT.” Microsoft Learn
Frequently Asked Questions
What is PORT_DRIVER_INTERNAL?
It is the symbolic name for Windows bug check 0x0000002C. Microsoft says it appears very infrequently. Microsoft Learn
Does it mean my USB port is damaged?
The code alone does not establish that. Microsoft’s dedicated page identifies no specific type of port or device. Microsoft Learn
Does it identify a faulty storage driver?
No particular driver is identified by the stop code alone. Inspect the stack and actual device path first.
What do the four parameters mean?
Microsoft’s 0x2C page does not provide parameter definitions. Record them from the dump without borrowing meanings from another stop code. Microsoft Learn
Is 0x2C the same as SCSI_DISK_DRIVER_INTERNAL?
No. Microsoft lists PORT_DRIVER_INTERNAL as 0x2C and SCSI_DISK_DRIVER_INTERNAL as 0x2D. They are distinct bug-check entries. Microsoft Learn
Where should I start in WinDbg?
Run !analyze -v, then inspect the stack and implicated driver path. Microsoft specifically recommends !analyze for this code. Microsoft Learn
Summary
PORT_DRIVER_INTERNAL (0x0000002C) is a very rare Windows bug check with limited official detail. It does not identify a physical port or a universal repair. Confirm the code in the dump, inspect the driver and device path in WinDbg, and act on the component the evidence actually implicates. Microsoft Learn
Sources
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