Unexpected error; quitting

New machine installed and I am trying to install the current version 1.1.0 on my new PC. I have been using PDFCreator for years under Windows XP. The new machine also has Windows XP.

When insalling I get the "Unexpected error;quitting" message. Click OK and the install finishes. When I start PDFCreator, I get the same error message.

Any help would be great.