I just managed to get it running on windows 10, after having that same old itch. What I did was to add the "play" page to my java exception url list. (and the p4 home page just in case as well) Then I downloaded the "IE tab" extension for google chrome. Opened p4, told the extension to open in an IE tab, and ran the game. I just had to tell java it was okay multiple times, but its running for me now. Good luck