Use Device Manager
Expand Keyboards
Right-click the keyboard device
Select Disable device if available
If Disable is not available, select Uninstall device
Restart the laptop if needed
Use BIOS or UEFI settings
Look for internal keyboard, built-in device, or input device options
Disable the internal keyboard if the option exists
Use a keyboard lock or disable-key utility
Install a third-party keyboard-disabling tool
Turn on Filter Keys in Accessibility settings
Use an external USB keyboard before disabling the built-in one
Re-enable the keyboard later through Device Manager or BIOS if needed