A way to solve this issue is open your ‘Control Panel’ and go to ‘Hardware and sound’ make sure that your laptop speakers are the primary playback device. This resets your settings. Also there could be multiple background programs running, and they might be interfering with frequencies, so try disabling Bluetooth

The high pitched noise may be due to your fans needing to be cleaned, try blowing air forwards and backwards through the fan. Another option is to shut your computer off and let it cool down. If noise continues you may need to take the computer apart to do more cleaning of the fans.

You may need to update your mouse settings. You will find this in your control panel, under hardware and sound. You will then go to device manager which is under devices and printers. Another window will pop up and you will right click on mice and other pointing devices. A button will pop up, scan for hardware changes. This will update your mouse to most recent device settings. It may take a moment. If this doesn’t work you may need to slow down the pointer speed on your mouse.