Thanks Sebastian

I checked the Database and found that the tables EventLog, EventLogConfig, EventLogTypes are in database with many records. But I found a funy phenomenon that the portals fold got three child portals (Portal 0, Portal 1, Portal 2). Actually the wizard guided me to the Portal Administrator configuration page, and encountered the errors, and then stopped, I could not go further. Then I stopped the installation. How come the more portals to be created? I checked the Database that three records in Portals table and nothing in PortalAlias table.  This may be some exception events happened in the installation procedures. I am not sure what happened in the installation. If you are interested in some records, I can transfer the records to tables to past on the thread post.

Thanks again

Hi Sebastian Leupold

Thank you for your response.

I deleted the database and all the files, restart installation from the scratch. I tried twice. At first try, this error occurred again but didn't create more child folds. At last I installed successfully. I installed two instances of Dnn 5.0.0.0, So far the first instance has been running well, but for the second instance, I installed successfully one off and run the site for the first time. But when I run the site second time and call the default.aspx, this error happened again. I suspect if some bugs buried in event process codes or somewhere else. This is just as the reference for the core team.

Thanks again

Jimmy