Why is the Windows 11 computer humming?

The most common source of humming is the cooling fans (CPU, GPU, case fans). If they are running at a higher speed due to increased temperatures or dust buildup, they can produce a humming or buzzing sound.

If your computer has a traditional spinning hard disk drive (HDD), it can produce a humming noise when it is actively reading or writing data. This is normal, but if it gets louder or is accompanied by clicking sounds, it could indicate a failing drive.