Follow the instructions here if you need to install a
digital certificate on the projector to provide security for your
presentation files (PowerLite
975W/2055/2065/2155W/2165W/2245U/2250U/2255U/2265U).
Note: You can
register a digital certificate over a network or from a connected
USB device. However, be sure to register just once from either a
USB device or network, or the certificate may not install
correctly.