I have the same problem, I've noticed that when I open opera (Version: 25.0.1614.50) the computer freezes and no longer could do nothing more and with the mouse or keyboard, the keyboard worked sometimes a few seconds and pressing alt + f4 could close opera and there and everything was returning to normal.
Do more on the web, with a fast and secure browser!
Download Opera browser with:
- built-in ad blocker
- battery saver
- free VPN