Select from the context menu (or Install for all users if you have administrator privileges).
Never click on file outputs ending in .exe , .bat , or .msi when downloading a font; legitimate assets should only possess a .ttf or .otf extension. Tm Gangai Tamil Font Download
Click the button at the bottom of the window to add it to your system library. Best Applications for Using Tm Gangai Select from the context menu (or Install for