In the event you encounter any trouble setting up or deleting iTunes you should probably look at this article prior to going entirely nuts!!

http://bit.ly/cRefvt

Apple itunes can be very challenging to un-install effectively because of a quantity of computer registry keys inserted through additional pieces of software that it works with. This article clarifies what you need to perform item by item if you fail to un-install i-tunes utilizing the ADD/REMOVE application. If you don’t entirely un-install this appropriately you’ll get a number of problems any time attempting to use a brand new copy… even if you try to write over the existing copy. This particular software saved me hours of frustration and I didn’t lose my personal iTunes music!

Here is an excerpt:
Your own last install of itunes got messed up on your pc somehow, or was interrupted during download. It really doesn’t matter exactly how. It happened to me. I soon recognized I had to un-install i-tunes and then reinstall itunes again. So I thought I would simply copy down the the latest software revision first to try reloading it. No dice. So I thought ok, let me get rid of this old copy using the ADD/REMOVE feature in the control panel and try again. Not so easy! Incredibly I could not get rid of the itunes software from the Programs list! Reloading itunessetup.exe gave mistakes and would not start! In my personal ensuing hours of on-line research I found many articles from people with just this identical problem. So let me share with you some answers as well as special itunes repair software that I found from just about all the articles I researched that will help readers solve this problem as well as keep you all from going crazy trying to fix this!