1. Remove any traces of Java Runtime from your computer. Do this by clicking the Windows 'Start' button and clicking the 'Control Panel.'
2. Double-click 'Add or Remove Programs' (Windows Vista users) to open the programs window. For Windows Vista users, click 'Program and Features' and click 'Uninstall a Program' to open the programs window.

3. Scroll through the Programs window and select the Java application you have and click 'Remove/Uninstall' to remove it from your computer.
4. Try downloading and installing Java (see Resources) again. Move to the next step if you run into the 1722 error again.
5. Download the offline Java installation file (see Resources) and save it on your desktop. Double-click the offline installation file and click 'Run' to begin the installation wizard.
6. Click 'View license agreement.' Click 'Install' after reading it. The files are copied to your computer system and the program is installed on your computer.