I am working on a computer that previously had version 4.8, and the license had run out. So I uninstalled it and installed version 5, but now it won't let me register it. When I click the register button, the window closes, but nothing happens. I also tried using the online form, but the email was never sent. I hope this is addressed, this is the second time I have had problems registering avast, I had previously requested help when registering IS failed, but the post was ignored. I'm repairing this computer for a friend and I am out of time, so I had to install a different antivirus program since avast won't work. Here is a screenshot of the registration box (the links on the bottom, "Uninstall avast" and "remind me later" are also broken, they do nothing when clicked)