Today I was in class typing up my notes on my ibook (g4), using microsoft word.  Nothing else was open except microsoft word.   After a little pause in typing I went to go back to typing again.  All of a sudden, a black horizontal scrolling bar slid down the screen and the screen turned white and the scrolling bar just kept going down the screen.  I tried everything to get it to work again. and then just had to hold down the power button.  I lost all my work and was bewildered as to what happened?  
I just checked for viruses and I just verified and repaired permissions the night before and had not even used my computer between that point until i brought my ibook to class. 
 
any ideas here?
	
		
			
		
		
	
				
			I just checked for viruses and I just verified and repaired permissions the night before and had not even used my computer between that point until i brought my ibook to class.
any ideas here?
 
 
		 
 
		 
 
		 
			