Okay, tech heads

I have a bolloxed Quicktime install on Windows XP Pro. I cannot get it to uninstall or run, even when I reinstall. So tell me, is there a way to utterly wipe Quicktime from my system to try a fresh install thereof? Reformatting and reinstalling is just not an option right now and would be a giant pain the ass anyway. I need Quicktime to play Second Life, apparently.

Discuss.