A:AnswerI'm not sure if yours is exactly the same model as mine (I bought mine Dec 2016), but if it is, mine doesn't support a pen. You can find out by going to Control Panel\All Control Panel Items\System. You should see "Pen and Touch". This field will tell you if your PC supports pen use.
A:AnswerI have not yet encountered this issue, but I looked around a little on the internet and found a very helpful guide to tell you how to do it. If you would like to look at some other ones, just google "How to Change User Folder Locations on Windows 10"
http://www.dummies.com/computers/operating-systems/windows-10/how-to-change-the-location-of-user-folders-in-windows-10/
A:AnswerYou need to buy a Universal Adapter directly from ASUS. I bought one from Amazon and had the same problem as you, wrong tip. Universal model from ASUS comes with 4 or 5 different tips
A:AnswerYou have to go to the power settings page and select high performance to get the laptop into 4K display mode. Had the same issue and got an answer from ASUS.
A:AnswerYou need to check with Asus regarding drivers. Nvidia-distributed drivers may or may not work. Cooling might also be an issue. The interface and size are standardized but you should check the height of any new graphics card you may be considering (for case clearance).
You will also need very tiny TORX tools to disassemble the case.