Replying to InstallDriver Module problem when installing Quicktime and itunes

Hey, i'm wicked bad at figuring these things out, so i have a question.
i was just trying to download the new quicktime and itunes for my ipod, and while quicktime was getting installed it said "InstallDriver Module has encountered a problem and needs to close" wtf is this? it wont let me download then new versions of either now. i've tried looking it up on the net, but to help there. any idea? i know there are some computer wizzes on here. thanks