When previewing a report you only getting a small window in upper left corner with only a text string with the name for the report and the rest blank. When I trying to close this window, you get an error message: "Errors exist. Do you want to discard changes?" (Y/N). Pressing Yes, hangs and close the RTC client.
You have installed the RTC client outside the setup chainer or you have uninstalled Report Viewer 2008. It may also be that Report Viewer 2008 installation is broken.
Run DVD\Prerequisite Components\Microsoft Report Viewer 2008\ ReportViewer2008.exe and select install or repair depending on if Report Viewer 2008 was already installed.