hi folks

i am using Win XP Pro....and Office XP.... my prob is when ever ui open any app that have a text box or some other box to type in automatically "if.." is typed without any reasons....sometimes i am unable to move the scroll bar ..i move i down it sgoes back to the position i started from ....well i reject backdoor/trojan on my PC as it also happents when i am not connected to the n/w..... tried scanning with updated definations from norton....but i doest show any virus...
anybody has any idea