Computer wont allow change of display

[green777]

I have a dell optiplex L60 and managed to solve the unmovable block problem,
Ive installed the xp windows home edition but cannot change the display options I tried all the things about properties, selecting monitor but cannot get to drivers option for monitor its there but not highlighted,Is there any place i can down load and install the drivers manually? Dont have the disks as the computer was donated to my partners play school for the children to use,
so it boots up od but stuck on very low graphics, done the video card checks all ok, as for dell could not find any monitor driver downloads so hopeing someone may have a site i can get them from,
Thanks,
Peter