i am not computer savy and own an aspire one running widndows xp, in powerpoint when i run a video it will play anything up to 4 minutes and the screen will go blank but sound will continue. if i plaw video in a player it will sustain full screen for up to 4 minutes and then reduce the screen size to include the "frame". I tried to refresh windows with an installation but all i get is the notebook trying to boot from the installation disc which isn't there! Any suggestions in simple english please, Dave