Windows Vista on HP laptop no colors all black and white

My system is a Hp G60-244DX notebook pc with an AMD athlon X2 processor and nvidia graphics card.There is color in BIOS and the windows splash screen is color, everything else is black and white. I am unable to do system restore because I had low memory on HDD. I created a new user on the system and this had color even though it starts in black and white eventually the color comes on. I have a feeling it’s a software issue but i don’t know how to resolve it. Please any assistance will be appreciated.