Unity doesnt start on my xp

When I double click the icon for Unity 3.0 it shows the splash screen then goes to the open or create new window after I select one or make a new one and click "ok" then it disappears and never comes up with Unity 3.0. How can I fix this?!?!?!?

first i would say try to reinstall. if it still doesn't work, what is your pc's specs? I don't know if specs matter for unity3d, but if it is too low, it would make sense.

Try Unplugging Your Computer Then Plug It Back In Tomarrow Then Re Install Everything Back(If You Lose All Your Programs) Then Try Unity Setting It Up. If This Doesn't Work, Then Sorry.