Edition Fullscreen

vista 32 bit and 16 bit?

i’ve got window vista home premium edition installed on my pc. and, i hav 340MB of graphic shared memory. first, in my graphic setting, the colour quality is 32 bit, screen resolution is 1280×800 and refresh rate is 60 hertz. everything was fine then. but, last wk, when i watched videos online from like youtube or google video. i cant go to fullscreen mode. when i switch to fullscreen, i cant see anything. so, i changed colour quality from 32 bit to 16 bit. then, i can watch the videos in fullscreen mode. but,the desktop screen is not as clear as before. its a bit blurred and icons are not that looked good. i think it shouldnt be happened like this.cos my graphic memory is good enough to handle 32 bit mode. i suggest something wrong with the graphic setting or maybe i need something else.but, i dont know what i need to do. i’ve reinstalled the graphic driver.but, its not still working. so, if u know how to solve this problem, can u help me with this?thank u.

What graphics card or chipset do you have?

The Stampede (The Animated Crossover) *Fullscreen Version*