I enter everything as required, but it still won't let me advance to checkout for premium membership. It just says "Attention! Please make sure that all your information is entered correctly before submitting your payment.", and it won't disappear, nor does a button appear after everything is entered. I'm quite frustrated....
Sadly, I've been unable to make the update to my Intel HD Graphics 4000 drivers, thanks to HP's proprietary drivers. D: I'm stuck at version 18.104.22.16857 from November 2012, and they have yet to release their version of Intel's current version 22.214.171.12471. I'm running into the same exact rainbow effect and flickering, except HP is preventing me from fixing the issue.