Computer crashed, now colors are horrible - need driver?

I had Windows 2000 Professional, computer crashed the other day. Somoeone intalled Windows 98, because we didnt' have a disk for Windows 2000, since I bought the computer used. I had to get the computer back from him earlier b/c of a personal emergency with him. Anyway, the colors really suck....I can only choose 2 colors or 16 colors. Is there a driver I need to download? If so, I don't know where or which one. Like I said, the computer is used, and the only thing I know is it's a Compaq Deskpro....and on the side I see this: DPEP-C400/4 3/W5. Does this mean anything to anyone? I hope someone can help....everything looks horrible! Oh, and also I can't change the screen size, only option I have is 640 x 480 pixels.

 

try these thay might be the right ones,but more info on model number would be good.
these might work http://h18007.www1.hp.com/support/files/Deskpro/us/download/8913.html

 

match your computer up with 1 off these models then you will have drivers http://h20180.www2.hp.com/apps/Look...&h_query=Compaq+Deskpro&submit.x=6&submit.y=5

as above thats all i could make off the DPEP-C400/4 3/W5 try shouldn't hurt

 

[tsg=welcome] Welcome, Jia [/tsg]

 

Thanks for your help. I had to go in and see what kind the card was inside, and then search from there. Finally got it fixed this afternoon!