In the thread at http://forums.adobe.com/thread/985553 I did not recommend re-imaging. I suggested uninstalling and reinstalling. Installing RoboHelp via an image might be a problem and I emphasise "might" not "will". If you are having this problem with all projects, then I would uninstall from the imaged PC and reinstall with the DVDs.
If following up a previous problem you have posted, it is best to continue that thread as it could contain useful information plus any replies will now be spread across two threads.
Do you get this problem with all projects including the sample projects?
Please see the Stick Topic "Before you post" and always start threads with the edition and version of RoboHelp you are using.
See www.grainge.org for RoboHelp and Authoring tips