Win 7 UAC blocks automatic pdf creation

I've experienced that win 7's UAC prevent direct pdf saving.
File is sent to virtual printer, but I need to manually run pdfCreator each time giving UAC authorization due to program's unknown author to open the pdf save window.
This happened using either 1.2.3 and 1.3.0 version.
Microsoft support told me to ask program developer's support, so please could you tell me what I have to do to solve the issue?