A:Answer Thank you for your questions about this HP Envy desktop! This computer does not come with a built-in CD or DVD drive, but you can easily purchase an external USB CD/DVD drive and connect it to one of the available USB ports. The sound system is integrated into the motherboard, so the sound card is not replaceable. In terms of what cannot be upgraded, the key components that are built into the motherboard include the sound system and certain proprietary connections. However, the memory (RAM) and the solid-state drive (SSD) are upgradable. As for the operating system, this computer comes pre-installed with Windows 11 Home. While you can install Windows 10, you may need to find and install compatible drivers manually, as HP may officially support only Windows 11 for this model.
