actually i am using desktop not the laptop.
ok..i use imac 27 inches,Mac OSx 10.6.5 version..this problem is like.it is happening from last 6 days continuosly,whenever i start my mac.this problem starts with it.
The problem is when i open a browser or finder or any software it starts scrolling the page and zooming it.sometimes it scrolls,sometimes it zooms.I have checked everything no extra shortcuts,no key pressing,no other sftware dwnloading,i changed the mouse,keyboard,updated my Mac software but nothing happened.