i tried reinstalling my sp1 after i formatted my computer and when i click the autorun i get an error message saying

the automated page didn't start properly and i need an administrator account. but i'm positive i am the comp admin.

or

you click 'no' on ie security warning dialog box. make sure you click yes and press f5.

i am not aware of it but i'm sure i didn't clicked no on something.

btw. when you have sp2 do you still need to install sp1?