I was trying to install a game that used to play when I was young, Runescape. I didn't enjoy the new version of that, so I tried to download the oldschool Runescape. Happens that after the download, every time I try to install the game I get this error:
Does anybody know what should I do to get over this error?
Update: I followed your comments and updated my Java, still got the error when I try to install the game, but now I'm already able to play it online in Mozilla Firefox.