Yes, the modem is fully compatible with Windows 7 platforms. If it doesn't work on your computer, go to Start > Control Panel > Hardware and Sound > Device Manager, locate the Leonardo Webkey modem, right click on the driver and select Uninstall. After that, reboot your PC, connect the modem and click the Scan for hardware changes icon from Device Manager. Windows should automatically find and install the drivers. If it still doesn't work, use Google to find and install the driver manually.