A:AnswerIt is a 27" diagonal viewing area screen. It has a 16:9 aspect ratio, I don't know what you mean by "wide screen". 16:9 aspect ratio is considered "wide screen". Yes, you can uninstall Windows 8.1 and then install Windows 10. This system is compatible with Windows 10.
A:AnswerWe recommend you check with the publisher of the software for compatibility. There should be no reason that the touch screen function would not work with any software that is compatible with Windows 10 Home and the configuration of this system.
A:AnswerThis sounds like a driver may need to be updated. You can follow the link below to Lenovo.com support - drivers. Hope this helps.
http://support.lenovo.com/us/en/products/Desktops-and-all-in-ones/Horizon-Series/Horizon-2-27-Table-PC-IdeaCentre/F0AQ/000PUS?linkTrack=Caps%253ABody_SearchProduct&tabName=downloads&beta=false
A:AnswerThe only mount on the back is for the special table that is sold for the tablet. If you purchase that you can use it as you want and when you're done the hydraulic allows for you to compress it and roll it into a corner. You should have a picture of the table for the tablet in your Lenovo box.