Windows 10 Unwanted text selection, and caps lock button reversal.

[hamsimp]

for some time now, I have been having trouble with writing with my "windows10" laptop. When going back to make corrections in my text, or when adding quotation marks, it suddenly starts selecting seemingly random portions of text every time I click anywhere in the text. Restarting my computer will fix the problem, but I cannot save my text first, because it won't let me select all the text. It also reverses the action of the Caps Lock button. Everything is fine as long as I don't make any corrections, or use quotation marks. This problem seems to be connected to an upgrade.