Thanks for the reply. Now to answer your questions:
"I am guessing being in this forum you are talking about the winControls correct?"
"By fresh install do you mean you have never had Telerik installed before? "
Not the winforms controls, but i have installed the ajax and silverlight trial before this.
"Are you getting the error when you try and drag and drop a control onto the form?"
yes. All the controls except RadButton
"Do you have the latest .NET framework installed?"
I don't know how to post a screenshot in the forums, but the the error is the same you posted before. The steps are simple too, since it is a test project, only the default form and when i try to drop a control it causes the error.
As an aditional info, the test project that came in the installation is presenting many errors (No such property registered) too.