Hello, am using 13" MacBook Pro with 2.26 GHZ processor, 4 GB RAM, 320 7200 RPM HD. In the book, my trackpad has gone or might be few of those files have been corrupted, it is functioning randomly without user interference. It drags automatically for a single touch and opens something unwanted instead of clicked one. Now am using an external mouse, but sometimes the trackpad works randomly. So explain me how to disable it manually? Thank you.