- Software and digital services
- Operating system
DPC_WATCHDOG_VIOLATION
DPC_WATCHDOG_VIOLATION (0x133) on Windows: a driver takes too long to finish its work
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
High
Quick answer
Windows' deferred procedure call watchdog caught code running too long and stopped the PC. If the screen names a driver (.sys), write it down and look for an update on the maker's website.
Safety first
Stop and check this first
- 0x133 does not prove the processor or motherboard is faulty: Microsoft attributes it generally to driver code. Do not accept part replacements without dump analysis.
Safe checks you can perform
- Driver name on the blue screen
- Earlier errors in the System log
- Recently installed hardware
Leave these tasks to a qualified professional
- Do not attempt this professional task: Identify the driver in the dump
- Do not attempt this professional task: Contact the driver's maker
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Identify the driver in the dump
What they doIT support loads C:\Windows\memory.dmp in WinDbg with public symbols, runs !analyze -v, reviews the stack (k) and, if parameter 1 is 1, !dpcs or event tracing.
They must show youthe output with IMAGE_NAME or the identified module and the value of parameter 1.
In writingwhich driver was updated or disabled and to which version.
Contact the driver's maker
What they doWith the module name, the technician asks the device maker for an update and, if none exists, leaves the service or device disabled and monitors stability.
They must show youthe old and new driver versions.
In writingdate of the change and whether the crash came back.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Driver name on the blue screen
- Who:
- you.
- How:
- photograph the whole blue screen and look for a file name ending in .sys.
- Result that matters:
- whether a specific driver is named.
- If one is named:
- check its maker's website for a newer version and, if there is none, disable that device to isolate the problem.
- If none is named:
- the name will have to come from the memory dump.
- Evidence to keep:
- a readable photo with the code and the .sys file.
Evidence: Bug Check 0x133 DPC_WATCHDOG_VIOLATION · Stop code error or bug check troubleshooting (IT professionals)
Earlier errors in the System log
- Who:
- you.
- How:
- in Event Viewer open Windows Logs, System, and review errors in the minutes before the stop.
- Result that matters:
- whether a device or driver logs repeated errors.
- If one does:
- it matches what Microsoft asks you to look for to identify the source of 0x133.
- If nothing shows:
- it is not ruled out; keep the dump for IT support.
- Evidence to keep:
- screenshot of the event with source and time.
Evidence: Bug Check 0x133 DPC_WATCHDOG_VIOLATION · Stop code error or bug check troubleshooting (IT professionals)
Recently installed hardware
- Who:
- you, with the PC off.
- How:
- unplug the external device you added before the first crash and check on its maker's site that it supports your Windows version.
- Result that matters:
- whether the blue screen stops without that device.
- If it stops:
- that device or its driver is the likely source.
- If it continues:
- reconnect it; the cause is another driver.
- Evidence to keep:
- what you unplugged and how long you tested.
Evidence: Bug Check 0x133 DPC_WATCHDOG_VIOLATION · Troubleshooting Windows unexpected restarts and stop code errors
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Software and digital services
- Brand
- Microsoft Windows
- Product type
- Operating system
Known code variants
- 0x00000133
- 0x133
- DPC WATCHDOG VIOLATION
- STOP 0x00000133
- stop code DPC_WATCHDOG_VIOLATION
What it means
Microsoft describes 0x00000133 as the DPC watchdog firing: it detected one long-running deferred procedure call (DPC), or the system spent too long in total at DISPATCH_LEVEL interrupt level or above. Parameter 1 tells the two apart. In general it is caused by driver code that, under certain conditions, does not finish within its allotted time. The code does not name the driver: that comes from the on-screen message or the dump.
Warnings and stop conditions
- Mediumeditorial warning
0x133 does not prove the processor or motherboard is faulty: Microsoft attributes it generally to driver code. Do not accept part replacements without dump analysis.
Evidence: Bug Check 0x133 DPC_WATCHDOG_VIOLATION
Symptoms and causes
Probable causes · in order
- Faulty or outdated driverCommon
This is Microsoft's general cause. If the screen or the dump names a .sys file, that driver is the main candidate.
Evidence: Bug Check 0x133 DPC_WATCHDOG_VIOLATION · Stop code error or bug check troubleshooting (IT professionals)
- New, incompatible hardwarePossible
Suspected if crashes began after installing a device; Microsoft asks you to confirm it is compatible with your Windows version.
Evidence: Bug Check 0x133 DPC_WATCHDOG_VIOLATION
Virtual technician
Does DPC_WATCHDOG_VIOLATION still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Bug Check 0x133 DPC_WATCHDOG_VIOLATION
Microsoft · 2026 · official_doc
- 2
Stop code error or bug check troubleshooting (IT professionals)
Microsoft · 2026 · official_doc
- 3
Troubleshooting Windows unexpected restarts and stop code errors
Microsoft · 2026 · official_doc
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