I came accross one very odd error, while I was installing CU2 for Exchange 2013 on WS2012. The problem was, that I used command line to install Exchange to different directory C:\EXCHANGE2013.
.\setup.exe /IacceptExchangeServerLicenseTerms /roles:mailbox,ClientAccess /MDBName:DB01 /m:install /DBFilePath:E:\DB01\DB01.edb /t:c:\EXCHANGE2013 /installWindowsComponents
I also tried to install Exchange using GUI with the same results. The only solution for my lab was to use default installation directory.
Does someone have the same problem?