ok so I picked up first on slow typing , this is caused by several things , firstly you could have a slow pc ( don't be offended ) , if this is the case all sorts of things could slow it down , it could be an anti virus scan running in the background taking a lot of cpu power or something updating.... Go to add remove and look for anything you don't recognise and dump it , you could have something running that you don't know about. I always choose custom install when downloading and installing something , the custom tab can list unwanted extras that you wont know about if you choose "typical" or full install. Finally look in start up menu to see what fires up at start up. The only thing I have in start up is the realtek sound driver , the anti virus auto boots ! .... hope this is of use to you .... let me know please. FOOTNOTE... have you looked to see if you have a yellow triangle next to the keyboard entry in device manager , if you have then right click it and choose uninstall "windows" will auto load a generic driver on boot up.
Microsoft Surface Book 2 15in review