3) Uninstallation failure, or installation failure after a previous installation or uninstallation failure.
There are a variety of problems that have cropped up when trying to uninstall, or when trying to install after a previous failure while installing oruninstalling. Many of these are fixed with Paint.NET v2.6, however that doesn't fix that the older version still on your system is still having trouble removing itself! Try following the instructions listed in the next post (originally from this thread: http://paintdotnet.1...rumer.com/viewt ... ght=spooky) . Then try installing the latest version of Paint.NET.
That forum doesn't exicst anymore