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- HP Community
- Notebooks
- Notebook Software and How To Questions
- CPU is stuck at 0.40Ghz

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02-01-2026 10:54 PM
my CPU clock speed is stuck at 0.40Ghz when I have my charger connected and when I unplug the charger then I get my normal clock sped it was perfectly fine yesterday
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Accepted Solutions
02-03-2026 08:28 AM
Hi @Aditya3010,
Welcome to the HP Support Community.
Thank you for posting your query. I will be glad to help you.
If your HP Notebook's CPU clock speed is stuck at 0.40GHz when the charger is connected, this issue often relates to the power management settings in place. Here are some steps to help troubleshoot and resolve this problem:
- Check Power Settings:
- Go to Control Panel > Hardware and Sound > Power Options.
- Select the power plan you are currently using and click on Change plan settings.
- Click on Change advanced power settings and look for Processor power management.
- Ensure the Minimum Processor State is not set to a very low percentage for both Plugged in and On battery.
- Make sure the System cooling policy is set to Active.
- Check for Thermal Throttling:
- Ensure the cooling vents of your laptop are clean and not blocked.
- Use a laptop cooling pad if necessary to improve airflow.
- Update BIOS and Drivers:
- Ensure that the BIOS on your notebook is up-to-date. You can download the latest BIOS version from the Official HP® Support.
- Also, update your chipset and other related drivers to ensure optimal hardware performance.
- Inspect the Charger:
- Ensure the charger is the original HP charger that came with your notebook.
- If possible, test with another compatible charger to rule out any issues with your charger.
- Battery Health Check:
- Use the HP Battery Check tool within HP Support Assistant to ensure your battery is functioning properly.
- Use the HP Battery Check tool within HP Support Assistant to ensure your battery is functioning properly.
- Perform a Hard Reset:
- Shut down the laptop and disconnect all external devices.
- Disconnect the charger and remove the battery (if removable).
- Press and hold the power button for 15 seconds.
- Reconnect the battery and charger, then power on the laptop.
- Use HP Support Assistant:
- Run the HP Support Assistant | HP® Support to check for any system issues or updates that could address the problem.
- Run the HP Support Assistant | HP® Support to check for any system issues or updates that could address the problem.
- Windows Power Troubleshooter:
- Run the Windows Power Troubleshooter by going to Settings > Update & Security > Troubleshoot, then select Power and run the troubleshooter.
If these steps do not resolve the issue, it could be indicative of a hardware problem, and you may need to contact an HP Authorized Service center for further assistance.
I hope this helps.
Take care and have an amazing day!
Did we resolve the issue? If yes, please consider marking this post as "Accepted Solution" and click "Yes" to give us a helpful vote - your feedback keeps us going!
Regards,
VikramTheGreat
I'm an HP Employee.
If this reply helped resolve your issue, please select the Accept as Solution as it helps others in the community quickly find the answer they’re looking for.
And if you found this reply helpful, clicking Yes below is a great way to let us know we’re providing the support you need, as it encourages us to keep improving and sharing helpful guidance.
02-03-2026 08:28 AM
Hi @Aditya3010,
Welcome to the HP Support Community.
Thank you for posting your query. I will be glad to help you.
If your HP Notebook's CPU clock speed is stuck at 0.40GHz when the charger is connected, this issue often relates to the power management settings in place. Here are some steps to help troubleshoot and resolve this problem:
- Check Power Settings:
- Go to Control Panel > Hardware and Sound > Power Options.
- Select the power plan you are currently using and click on Change plan settings.
- Click on Change advanced power settings and look for Processor power management.
- Ensure the Minimum Processor State is not set to a very low percentage for both Plugged in and On battery.
- Make sure the System cooling policy is set to Active.
- Check for Thermal Throttling:
- Ensure the cooling vents of your laptop are clean and not blocked.
- Use a laptop cooling pad if necessary to improve airflow.
- Update BIOS and Drivers:
- Ensure that the BIOS on your notebook is up-to-date. You can download the latest BIOS version from the Official HP® Support.
- Also, update your chipset and other related drivers to ensure optimal hardware performance.
- Inspect the Charger:
- Ensure the charger is the original HP charger that came with your notebook.
- If possible, test with another compatible charger to rule out any issues with your charger.
- Battery Health Check:
- Use the HP Battery Check tool within HP Support Assistant to ensure your battery is functioning properly.
- Use the HP Battery Check tool within HP Support Assistant to ensure your battery is functioning properly.
- Perform a Hard Reset:
- Shut down the laptop and disconnect all external devices.
- Disconnect the charger and remove the battery (if removable).
- Press and hold the power button for 15 seconds.
- Reconnect the battery and charger, then power on the laptop.
- Use HP Support Assistant:
- Run the HP Support Assistant | HP® Support to check for any system issues or updates that could address the problem.
- Run the HP Support Assistant | HP® Support to check for any system issues or updates that could address the problem.
- Windows Power Troubleshooter:
- Run the Windows Power Troubleshooter by going to Settings > Update & Security > Troubleshoot, then select Power and run the troubleshooter.
If these steps do not resolve the issue, it could be indicative of a hardware problem, and you may need to contact an HP Authorized Service center for further assistance.
I hope this helps.
Take care and have an amazing day!
Did we resolve the issue? If yes, please consider marking this post as "Accepted Solution" and click "Yes" to give us a helpful vote - your feedback keeps us going!
Regards,
VikramTheGreat
I'm an HP Employee.
If this reply helped resolve your issue, please select the Accept as Solution as it helps others in the community quickly find the answer they’re looking for.
And if you found this reply helpful, clicking Yes below is a great way to let us know we’re providing the support you need, as it encourages us to keep improving and sharing helpful guidance.
02-03-2026 08:29 AM
Hi @Aditya3010,
I hope this helps.
Take care and have an amazing day!
Did we resolve the issue? If yes, please consider marking this post as "Accepted Solution" and click "Yes" to give us a helpful vote - your feedback keeps us going!
Regards,
VikramTheGreat
I'm an HP Employee.
If this reply helped resolve your issue, please select the Accept as Solution as it helps others in the community quickly find the answer they’re looking for.
And if you found this reply helpful, clicking Yes below is a great way to let us know we’re providing the support you need, as it encourages us to keep improving and sharing helpful guidance.