Follow the steps as mentioned to know about how to connect HP Photosmart C4780 to laptop without CD. To do that, you need to unbox the printer and set it as default by filling the ink cartridge. Now, connect the HP printer to laptop by using USB cable and then turn on your device. check that your router is turned on for wireless printing and then choose the wireless configuration option from control panel. After that, choose to connect option and start printing wirelessly by downloading software. Here, search for printer software by checking out the manual. Choose software or driver for printer and then tap to download. Lastly, click the connect option. https://prompthelp.us/blog/hp-photosmart-c4780-wireless-setup/