I try to install CTP5 of SQL Server 2008 on a virtual PC running Windows XP (Dutch edition, SP2, all hotfixes and updates applied. I have installed NOD32 (antivirus), but no other software.
At the end of the CTP5 installation, the progress screen displays a status of "Failed" for the components Database Engine Services, Replication, and Reporting Services. For other components, the status is "Success".
A quick inspection of the log files does not give me any clue as to the reason. I lack the time for a detailed analysis of the log files, but I will attach them (as a ZIP file) to this bug report.
After this failed setup attempt, I can start up Management Studio, but I can not connect to SQL Server - the error message says the server is in single user mode, and only a single administrator can connect.