icons too big

Hi I went to boot up my laptop that has XP on it, Everything is big now. The Icons and every program that I open. Even the internet, it looks like the screen is to small. The icon are big, when I go online the internet is bigger than the screen. It was fine yesterday and I ask the rest of my family and nobody seems to know. Please help and thank you.

 

Hi thankyou that worked fine. Do you think you could help on one more quirk. When I go into the enternet and try to go to another redirect screen, why is that screen half the size of the normal internet.