Cannot get full screan fuction to work

[mbkmbk88]

Hello,
         I have a dell 4550 dimension with a pentium 4, xp service pack 3. My systems was just compleatly upgraded and restored. But just like before when on the internet, even when on U Tube when I hit the full screan button all that I get is a white screan. What's to do?
                                                                                                                    Thanks, mbkmbk88

[jason2074]

What function or button do you use to view fullscreen and browser using? Do these happen on other browser and on youtube website only?