On a Windows Vista-based computer, you turn off the User Account Control (UAC) feature. However, if you log on to the computer as a regular user, and then you try to install a font, the operation fails without any error message.

During the installation process, a circle appears around the pointer, and then it disappears. At the same time, the CPU usage increases to 100 percent for a while. The operation seems to finish successfully. However, when you check Fonts in Control Panel, the font that you tried to install does not exist.