Hi, xwp1 isn't usb powered so keep the AC power supply connected to XW-P1. after the first time, xwp1 can be connected when is "on".(don't use a hub and don't use an "extra long" cable) For the first time, windows have to detect and install, so it should take a fiew minuts. Don't forget to instal the Data Editor for XW-P1. After that, the settings depend on what you want to do (master keyboard, slave with a sequencer ...) but anyway, the data editor works and detect the xwp1. By default, the usb settings lets you do it ...(page e-79)