STOP 0x00000133
DPC_WATCHDOG_VIOLATION
A driver hogged the CPU at high priority for too long and Windows' watchdog stepped in. Storage drivers and SSD firmware are the classic cause, with network and GPU drivers close behind.
Likely causes, most common first
- Outdated SSD firmware (historically the top cause of this exact code)
- A buggy storage driver (iaStor*, storahci) or controller driver
- Network or GPU drivers stuck in a long operation
- Incompatible or ancient drivers after a Windows feature update
How to fix it
1. Update SSD firmware and storage drivers easy
- Install the drive maker's tool (Samsung Magician, WD Dashboard, Crucial Storage Executive, ...) and apply any firmware update.
- Update the storage/chipset driver from your PC or motherboard maker's support page.
- Reboot and watch for recurrence.
2. Update the identified driver easy
- The report names the module involved — update it from the vendor link in the driver card.
- If it's a Windows core file (like ntoskrnl.exe), that's the watchdog reporting, not the culprit — follow the storage steps above instead.
3. General driver refresh easy
- Run Windows Update including optional driver updates.
- Clean-install the newest GPU driver.
- Update Wi-Fi/Ethernet drivers from your PC maker.
The four parameters on the blue screen
Windows shows four hex numbers with this stop code. Here's what each means — our analyzer decodes them automatically from your dump file.
| Parameter 1 | 0 = one DPC ran too long, 1 = the system was above normal level too long cumulatively |
| Parameter 2 | Watchdog period ticks |
| Parameter 3 | Address of the DPC watchdog global |
| Parameter 4 | Reserved |
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