Error while trying to install a software named k-free

Hello,
I am trying to install a replace and find software named k-free, but I find the following error message:
"This program cannot be installed on Windows NT version 6.0"
I have attempted 2 dissimilar find and replace software courses. These allow me to get a pre-made website as well as replace my PayPal information and Adsense ID. I am using Vista Ultimate.
I need to solve this. Please help.
