It hasn't actually happend in a little while, and it isnt an error box, its an installer box. It first tries obtaining the needed files, cant find them, and then prompts me to give the location of the files. And I'm using XP. (By the way, I'm not a n00b to computers or anything... So don't talk to me like one:
that means every single word of it
(That is not supposed to sound angry or anything)