My first post in a while... anyways, I tried downloading one of the latest versions of optifine (version 1.8.7 HD U D5) and it said my cookies were enabled. No problem right? Click settings, then internet options, then privacy and allow all cookies, right? Wrong, when I enabled cookies, it says I still didn't have cookies enabled in my browser, and also it said I don't have adobe flash player, but it is installed automatically with Windows 8.1. Is there something I'm missing? Or is there something wrong with Optifine? Or am I not doing something correctly? Thanks, chupacabra200( now known as: EndlessDayz)
Try installing / reinstalling Java. Enable cookies afterwards. Use google chrome, Try then, if it doesn't work, contact Optifine's help address.
Try downloading Flash Player again? Restart your web browser? Sometimes I can't get to things on websites because I need to delete my history and cookies. Maybe try that? Use a different web browser?