After you install Visio 2007, you can run the Setup program at any time to enter what's called maintenance mode. You can use maintenance mode to reinstall a feature that's not working properly, to add and remove specific features, or to uninstall Visio 2007.
To start the Setup program in maintenance mode, run the Setup.exe program from the Visio 2007 CD or the network installation point, or open Control Panel, and then choose the Add/Remove Programs option if you are running Microsoft Windows XP or choose Programs and then Programs And Features if you are running Microsoft Windows Vista. Select Microsoft Office Visio Professional 2007 or Microsoft Office Visio Standard 2007, and then click Change. If you are prompted with a User Account Control dialog, click Continue.