Do arquivo de ajuda (pressione F1):
"Full-screen mode and lens mode are only available as part of the Aero experience. If your computer doesn't support Aero, or if you're using a theme other than an Aero theme, Magnifier will only work in docked mode."
Sinto muito, mas o Home Basic não inclui o Aero. Do link a seguir:
"The Aero desktop experience, available in the Home Premium, Professional, Ultimate, and Enterprise editions of Windows 7..."