Ghostscript Error V5.1.2

I have been using PDF creator for some time on a single computer with a single user. I have now had to create a second user account on my single pc (for security reasons for a company that I work for). PDFCreator still works well on the original user, but gives me an "Internal Ghostscript error" and wont convert the document when I log in as the second user. This occurs in all programs.
I have uninstalled and reinstalled PDFCreator with the latest version. Still wont work.
Any help appreciated.