The installation process should start automatically when you connect the device. If it doesn't start, press Windows + R key combination, type devmgmt.msc and click OK. Connect the device, press Scan for hardware changes icon and wait Windows to install the drivers. If it doesn't work, use Google search engine to find and download the drivers, right-click on the ZTE device from Device Manager and select Update Driver Software. Click the Browse option to navigate to the installation package, select the driver and install it following the on-screen instructions.