Unchecky is a lightweight application that aims to “keep your checkboxes clear.” It automatically unchecks the boxes that allow companies to install promotional crapware on your computer, and issues warnings if you accidentally agree to install something you may not want. This in turn saves time and effort in clicks and it makes it less likely to miss a checkbox of an unwanted offer or potentially unwanted program (pup). Unchecky runs silently in the background of your computer. It uses only a small amount of system resources and can potentially protect your system against installing unsolicited browsers or applications that you didn't intend to install.
Thanks to Astron for the update.