Yes you can. There is a built in touchpad within this laptop that will perform as a mouse would.

That really will depend on the requirements and compatibility of the streaming service and the specific games you want to play. The Lenovo IdeaPad 3 15 Laptop, model number 81WE011UUS, ships with Windows 10 S-Mode Operating System. Windows 10 S-Mode provides added security by only allowing APPs available ( and therefore certified by Microsoft) at the Microsoft Store. If you don't need the added security or you need to install APPs not available at the Microsoft Store, you can switch to standard Windows 10 Home 64-bit Operating System, at no additional cost. We recommend you check with both the streaming service as well as the specific game's software publisher's web sites for their compatibility with Windows 10 S-Mode 64-bit operating system and the minimum/recommended hardware requirements (Is a Graphics card required, the processor speed and the minimum required system RAM and the minimum available hard drive space) to run their program, then compare those requirements to this system's configuration.

The Lenovo IdeaPad 3 15 Laptop, model number 81WE00NKUS, ships with stereo 1.5W system speakers with Dolby Audio. For the best audio experience, be sure Dolby Audio is turned on and adjusted to your personal preferences.

This model is not user upgradable. A certified technician must do all of the work, so as to not void the warranty. We recommend you consult your certified technician about your upgrade options.