does the PDFCreator.exe still run when you try to open it directly?
If the PDFCreator.exe is still working, but nothing happens when you print to the PDFCreator printer, it is most likely a permission problem and we can provide help how to fix it.
If the PDFCrator.exe doesn’t run at all, please try the following:
-Check that the PDFCreator program folder (e.g. C:\program files\PDFCreator) got deleted, if not delete it manully
-Reboot your computer