I also experienced that one but later on I was able to installed it. You will not be able to delete it by merely right clicking on the folder and then select Delete. Please try this one: First try to uninstall first the program in a proper way.
Please go to start and open Control Panel. Double click ADD/Remove Programs and uninstall the itune program.
Please go to start and open Control Panel. Double click Programs then under Programs Feature click Uninstall Program and look for the itune program then uninstall it.
As soon as the program is uninstalled, make sure to double check the iTunes installer that you downloaded first. Make sure that the one that you have downloaded is compatible to your Operating system.(XP, Vista 32/64, Win7, Mac). You will be given an option on what to download when you visit the iTune website or from Mac website.
Locate the iTune program and then double click to Run/Install
If you still got the error message, please kindly give us the message so that I can check that for you and for others to check also.
Edited by corneto_20, 17 April 2011 - 11:51 PM.