My wife upgraded her laptop from 7 to 10 about 8 months ago. She had the same problem that you are experiencing. I found this YouTube video and followed the directions which in turn worked for her. Hope it works for you.
Since Windows 10 downloaded itself to my laptop without my request this is the one of many annoying results that bothers me the most. When using my mouse the screen size very often increases or decreases without doing anything but moving the mouse, can I delete this function?
My computer "upgraded" to 10 without my knowingly allowing it to but I had Windows 8 which I hated so to me 10 is an improvement. Good bye and good riddance W8
It is rough and I pray every day... he passed the Suffolk test and now he has a decision to make. It would be a big cut in pay so he has to weigh all the options.