I need help.

Try:

Removing and reinstalling iTunes, QuickTime, and other software components for Windows Vista or Windows 7

Applies to 8 also

or

Removing and Reinstalling iTunes, QuickTime, and other software components for Windows XP

Maybe her:

Trouble installing iTunes or QuickTime for Windows

Next, post in the iTunes forum.

What responses did you get from the iTunes forum?

What exactly happens when you try to remove iTunes using the links I provided?