I downloaded the windows 10 3days before because the surface of my PC windows 8.1 recommending to introduce the windows 10 without any charge. It used many times to rebuild several times the PC and finally I got a windows 10. I felt the picture became smaller and slower to build. I tried to open the mail, I could not choice the several mail to cancel using Shift key. I tried again after rebuild, but no work. Next day I tried again many times, but no work. There was nothing good for me after downloading windows 10. You can download it until next July on no charge if you have windows 7, 8, and 8.1. Probably Microsoft company plans to change all PC to 10. But the users are troubled. I want to ask the company why you want foolishly to change to 10.