okie, first post, i jus formatted my thinkpad t60. and the first thing that was totally irritating is the beeping sound whenever 3 or more keys are pressed.

so here’s how you can disable it.

1. Open the Device Manager. You can do this from My Computer -> Properties -> Hardware -> Device Manager.

2. Show Hidden Devices. You can do this from View -> Show hidden devices.
Okie, this part is quite important, cos if u miss this step, u cannot really proceed further.

3. Under Non-Plug and Play Drivers, open the properties for Beep. Go to Driver -> Stop, and the beeping will cease.
You can also Disable the device from starting up by Selecting Disabled in the startup type dropdown list.

Source: Elliot Lee