When installing a new instance on an existing SQL 2014 CTP2 you might get this error:
like the one below
If you hit Retry it will popup again and if you hit Cancel your whole installation is cancelled.
After clicking Cancel:
The workaround is simple.
Find SQLServer2014CTP_License_EVAL_1033.rtf in C:Program FilesMicrosoft SQL Server120License Terms . On the properties window remove the Read-Only attribute and press OK
Now you can hit “Retry” on the Setup process warning message box.
Now you won’t have an excuse to further explore SQL Server 2014 capabilities !