To download and install Paint.net. Open the browser of your choice. Type getpaint.net into the URL bar. Click the download Tap. Scroll down to the download icon at the bottom of the page and click it. Click the text with Paint.net. Paint.net Installer will start to download. After the download finishes open the file. Click the installer. Leave everything as default. After installing Paint.net the program will run. You can exit the program by click file then exit. A desktop shortcut will also be created.