I haven't enabled Opera Turbo and I don't use any extensions as I'm fine with just the mouse gestures. It is compatible with Windows 10 because I used it just fine in the start.
But what I don't get now is that it's actually fixed without me doing anything. It wasn't the restarting of Opera that did it because I tried that several times before. My internet hasn't been slow either. I haven't removed any programs from my PC either. Didn't mess with any settings in Opera not that Opera has many settings to begin with.
Thanks for the suggestions though.