EN
0x00000101Severity: High

CLOCK_WATCHDOG_TIMEOUT

A processor core stopped responding (an expected clock interrupt was not received in time).

Quick answer

The Windows stop code CLOCK_WATCHDOG_TIMEOUT (0x00000101) means: A processor core stopped responding (an expected clock interrupt was not received in time). This code often points to hardware, disk or startup problems. Back up important files as soon as you can and follow the steps below; if it keeps returning, have the PC checked.

Before you start: note the stop code shown on the blue screen. If Windows will not start normally, it usually opens Automatic Repair after two failed starts; from there choose Advanced options to reach Safe Mode or System Restore.

Is it serious? Can I keep using my PC?

Severity: High

This code often points to hardware, disk or startup problems. Back up important files as soon as you can and follow the steps below; if it keeps returning, have the PC checked.

Common causes

  • Hardware fault (processor, motherboard, power supply)
  • Overclocking, overheating or unstable power
  • Outdated BIOS/UEFI or SSD firmware

How to fix it

  1. Restart the PC. If the blue screen happened only once and does not return, no further action is usually needed
  2. Reset any overclocking or XMP/EXPO profile to default and check temperatures and cooling
  3. Update the BIOS/UEFI and SSD firmware from the manufacturer
  4. Update or roll back the driver of the faulting device in Device Manager (look for yellow warning icons)
  5. Run the PC or component maker's hardware diagnostics; the part may need repair or replacement

Frequently asked questions

What does CLOCK_WATCHDOG_TIMEOUT mean?

The Windows stop code CLOCK_WATCHDOG_TIMEOUT (0x00000101) means: A processor core stopped responding (an expected clock interrupt was not received in time).

Is CLOCK_WATCHDOG_TIMEOUT serious?

Severity: High. This code often points to hardware, disk or startup problems. Back up important files as soon as you can and follow the steps below; if it keeps returning, have the PC checked.

How do I fix CLOCK_WATCHDOG_TIMEOUT?

Start with these steps: Restart the PC. If the blue screen happened only once and does not return, no further action is usually needed; Reset any overclocking or XMP/EXPO profile to default and check temperatures and cooling; Update the BIOS/UEFI and SSD firmware from the manufacturer; Update or roll back the driver of the faulting device in Device Manager (look for yellow warning icons); Run the PC or component maker's hardware diagnostics; the part may need repair or replacement.

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