When i boot-up/restart the option/alt key does not work allowing me to pick a OS. Yes i have windows vista and have installed it via boot camp . The alt key allowed me to switch between Vista and Leopard twice (each on a different occasion) then suddenly it wont let me any longer. Instead i have to go to System Utilities and startup disk which is a pain and causes unnecessary start ups for the iMac. HOWEVER my big worry is ... what if something happens to windows and it wont boot up ... then what???? am i screwed????? because i have to pick a default start up disk which has to be windows to get into vista, the thought of the imac just trying to boot into a corrupted vista is scary! cause i have no idea what to do then! (like how will i change the option to leopard). I have a WIRED keyboard with nothing attached (mouse in USB at back). Also when i start up in leopard an annoying "pop pop pop pop pop" sound occurs (that is what happens when a key is pressed on the keyboard for too long) and then it goes away after i press a random key on the keyboard. Maybe my keyboard is faulty? Also the eject disc and volume controls from the keyboard do not work in vista (however volume does work via infra red remote). What am i to do???