Acer laptop keyboard not wotking

Hello,

acer laptop keyboard spacebar and touchpad and left and right click buttons, enter key, del key, backspce keys are not working properly in ms word 2007..

When Iam typing some text in word 2007 and pressing spcebar button den it gives some code language and pressing enter and del keys it gives some other text...

pls help me...

thankjng you....