A:AnswerKey components of this system are replaceable/upgradable. You can refer to this system’s Owner’s Manual at the link below for the parts that are replaceable/upgradable by a certified technician. Please note, that if work is not done by a certified technician your warranty could be voided.
https://download.lenovo.com/consumer/desktop_pub/ic_aio_700-22_hmm_20151123.pdf
A:AnswerWe recommend you contact the game publisher for the minimum/recommended requirements to run the games you are interested in, then compare those requirements to the configuration of this system.
A:AnswerYes, you can use a second external monitor with this system. In order to get touch screen on the external monitor to work, the external screen would have to be a touch screen monitor.