Apparently, I already have the Framework 2.0 installed. However, I am still having a problem opening Paint.NET.
I tried these two downloads with no success:
http://www.microsoft.com/downloads/deta ... laylang=en
http://www.microsoft.com/downloads/deta ... layLang=en
For this download (http://www.microsoft.com/downloads/deta ... laylang=en), I got this message after attempting to download: "This product is already installed on this machine. To change or uninstall this product, please use 'Add Remove Programs' applet from Control Panel."