4. Repair Windows 10 image with DISM command
- Press the Windows key, and type cmd in search.
- Right-click on Command Prompt and select Run as Administrator.
- In the Command Prompt windows, type the following command and hit enter:
DISM /Online /Cleanup-Image /CheckHealth
- Wait for the tool to complete the scan and verify any data corruption that requires fixing.
- Next, run the following command to run an advanced scan and repair problems automatically:
DISM /Online /Cleanup-Image /RestoreHealth
- Wait for the tool to scan the system and apply the required fixes to resolve the issue.
If the tool is stuck at 20 or 40 percent, do not exit or turn off your computer, as it is a normal behavior. After a few minutes, the process will complete successfully.
If the issue persists, run the system file checker tool to scan the system files for corruption and repair them automatically.
Run System File Checker tool
- Open the Command Prompt as Administrator.
- In the Command Prompt, enter the following command and hit enter:
- Wait for the system file checker to complete the scan. If any data corruption is found, proceed to apply the recommended fixes by following on-screen instructions.
Once the fix is applied, reboot the computer. After the restart, check if the Synthetic Watchdog Timeout Windows 10 error is resolved.
5. Update BIOS
Check bios version
- Press the Windows key + R to open Run.
- Type msinfo32 and click OK to open System Information.
- Click the System Summary option.
- In the right pane, check your BIOS Version and Date field.
Start the update process
If you are using a laptop, you can download the latest BIOS version using the OEM system utility software.
Lenovo offers the Vantage utility to help users keep their systems up to date. You can also download the latest version of BIOS from the laptop’s OEM website.
For a custom-built PC, visit the motherboard manufacturer website to download the latest BIOS version for your system. You can refer to our detailed guide on how to update BIOS on Windows 10 for more details.
If updating the system BIOS did not fix the problem, check for hardware issues.
Consider using a third-party BSoD repair software to help you diagnose and fix the problem automatically.
6. Check for hardware issues
One of the common reasons for the blue screen of death error is faulty hardware or outdated driver.
If you had recently added a new piece of hardware to your computer, such as upgraded your RAM or added a USB device, check if the device is triggering the error.
Remove the connected USB device and reboot the computer. After the restart, check if the blue screen of death error occurs.
If the issue persists, check for internal hardware issues. Faulty RAM slots are also a known cause of BSOD errors. Empty your primary or secondary RAM slot and reboot the computer to diagnose the problem.
The Synthetic Watchdog Timeout error usually occurs due to a buggy Windows update or hardware issues. Follow all the steps in this article one by one to diagnose and fix the problem quickly.