Rendering images different from XP and Win2000?

[Benlecool]

Hello,

I'm developping a small game. Under win XP the game is fast enough. But I noticed that under Win98 or Win 2000, the game is very slow. I firgured out that's caused by the images renderning because if I minimise the window the game is fast, but if show it , it goes slowly.
are there any specified or recommanded componenents (images) that I should use to get the game always fast?

Thanks.

 

[kittyyo]

Which components are you using?
A program of mine which simply paints onto a TImage does not show any differences between 2000 and XP.