I've downloaded the SQL Server 2016 CTP 4 this evening and am trying to install it. I get this error message:
"The application cannot find one of its required files, possibly because it was unable to create it in the folder. Please make sure that the folder in which this application was downloaded is accessible and not read-only."
I have both the .exe and .box file in the same directory and it's not marked as READ-ONLY. I'm also installing it on a Windows Server 2012 and have unblocked the file incase that was giving the issue.