Welcome to the Candy Crush Saga Community
Do you have a question or need help with your game? Ask the Community.
Not sure if its compatibility issues but seeing as W10 is still pretty new, a few teething problems are to be expected.
Chrome has Flash in built and usually automatically updates itself so it should be that if you are using chrome. But if you also use Firefox, making sure you have the latest Flash update wouldn't be a bad idea.
Candy Crush should be installed onto W10 as standard, have you tried playing straight from the app instead?