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HP Desktop PCs - Fan is noisy and spins constantly (Windows 11, Windows 10)

When a computer fan spins loudly for a long period of time, there might be an issue with a fan, or the computer might be overheating. Adjust the power settings, let the computer cool for a few minutes, and then troubleshoot the noisy fan.


It is normal for the fans to spin loudly for five to twenty seconds when you first turn on the computer.


Gaming computers have additional features to change fan speed and adjust power and performance settings to reduce heat. For more information, see HP PCs - OMEN Gaming Hub.

Using Task Manager to identify corrupt processes and reduce heat

When multiple processes, such as corrupt software or malware, overburden the CPU, the fans run continuously to remove the excess heat. Open Windows Task Manager to identify these processes, and then close them.


An unnecessary or corrupt process can consume anywhere between 1% to 100% of the CPU. Even a low but constant 3% to 4% load can cause the fans to spin faster.

  1. Make sure that your computer is connected to the internet.

  2. Press ctrl + alt + delete, and then select Start Task Manager or Task Manager.

    Selecting Task Manager in Windows
  3. Click More details, if necessary.

    Selecting more details
  4. Click the Processes tab, and then click the CPU column header to sort the processes by CPU load.

    Clicking the CPU column header
  5. Use the internet to research and confirm any suspicious processes that are displayed in the list.

  6. Select each suspicious process, and then click End task.

If you did not find any suspicious processes or the issue persists, continue to the next step.

Adjust the computer power settings

Adjust the power settings to decrease power consumption, which can help the fans maintain an optimal internal temperature up to 30°C (86°F).

Increase efficiency to reduce heat

The computer works harder and generates more heat when multiple applications are open simultaneously, or while playing graphically intense video games.

Use the following tips to improve computer efficiency.

  • Change which applications run when Windows starts by using the Startup tab in Task Manager.

  • Close applications when you are done using them.

  • Close the internet browser when you are not using it.

  • Lower the game resolution and decrease the graphics settings if the computer becomes warmer than usual while playing.

If the issue persists, continue to the next step.

Let the computer cool

Remove the side panel and wait a few minutes to let the computer cool. If the computer is too warm, the fans work harder to decrease the internal temperature.


The edges of metal panels can cut skin. Be careful not to slide skin along any interior metal edge of the computer.

  1. Turn off the computer, and then disconnect the AC adapter.

  2. Remove any objects near the computer.

  3. Loosen or remove the side panel screws, if necessary.


    The following image is an example, and your side panel might be secured differently.

    Side panel screw location
  4. Slide the side panel back and away from the computer, and then set the panel aside.


    Do not touch any of the components inside the computer, even when the computer is off, to avoid shocking yourself or damaging the computer.

  5. Reconnect the power cable, turn on the computer, and then wait five to ten minutes.

Determine which fan is making the noise

Listen for and find the noisy fan inside the computer, and then take note of its location.


You can use a flashlight to help you find each fan, but do not put the flashlight inside the computer.

  1. With the computer on, listen for the noisy fan, and then use the following diagrams to determine its location.

    Interior of desktop computer
    Internal components




    Power supply fan


    Graphics card fan


    Processor fan


    Power supply fan vent


    Case fan vent


    Case fan

  2. Turn off the computer, and then disconnect the AC adapter.

  3. Reinstall the side access panel, and then continue to the next step.

Troubleshoot the fan

A dirty fan, vent, or outdated software can cause a fan to make more noise than normal. See the section matching the location of the fan that is making noise.


Do not continue to use the computer when a fan is not working correctly. Over time, exposure to consistently high temperatures can damage important internal components.

Contact HP Customer Support

Contact HP Customer Support for further assistance if the issue persists.

  1. Enter your product serial number to view warranty status and to change your location, if necessary.

  2. Select a support option. Support options vary by country/region.