Error when trying to install PDFCreator 1.2.2

I've been using PDF Creator for several years now.  I recently purchased a Toshiba Satellite C655-SP4164M with XP and oddly enough only disk E, no disk C.

When I try to install PDFCreator 1.2.2, I get the following error message:

"An error ocurred when trying to rename a file in the destination folder:"
"MoveFile failed; code 5."
"Access denied."

I need to produce PDF files in my computer.  What can I do?