Computer Graphics Help

I need some help.
Something happend on this computer. And the graphics got very bad quality and are very dis-colored.
Where can i change them back?
I went to Properties and then Settings. And i changed them from 16 colors to 256. And they are still bad.
Please help ^_^

 

256 colour is still bad - if u got a decent graphics card then you might need to install your drivers before you can go any further try this first

 

Its an older computer. And the dirvers are already installed.
256 looks terrible. In fact. It looks exactly the same as 16.

 

well u might wanna try and update them cause that may help ur problem

but what exactly happened to ur computer

 

Not really sure. But i fixed it.
And as for the Graphics. Im just going to re-install that driver later.

 

set it to 32 bit colour, at least 16 bit.

 

UPDATE THE DRIVERS!