To install the HP Envy Pro 7640 printer, start by unboxing the device and removing all packaging materials. Connect the printer to a power source and turn it on. Follow the on-screen instructions to set the preferred language, region, and paper settings. Load paper into the tray and install the ink cartridges. Next, visit 123.hp.com/setup Envy Pro 7640 to download and install the latest drivers. Connect the printer to Wi-Fi or a USB cable as prompted. Once installed, run a test print to ensure proper setup. Your HP Envy Pro 7640 is now ready for use.