Screen Problem at Start Up

[Mimi_in_FL]

I have windows XP.  When I start up or reboot,  my desktop appears as it should but then the screen goes black & the desktop reappears with the colors all wrong.  I have to reset to "true color" & to 800 x600 & then the screen come back to normal.

Why won't this setting stay put?

[Calum]

Have you tried updating your graphics drivers?
Has it always been like this?
If not, what happened before this started?