Not really a Navision issue, but I know a lot of Navision users use it for printing PDFs, especially since Rashed's great Tip How to save Navision Reports as PDF
so I thought it appropriate to post here.
The good news is that PDFCreator now support Vista, the bad news is that the Vista version now comes with a built in virus. In version 0.9.6 and 0.9.7 you have the option not to install the Malware, but unfortunately last months release 0.9.8 even if you untick the option, you will still have the malware installed and your IE and FireFox wrecked.
If you need 0.9.6 or 7 they can be downloaded at Filehippo
I will be following Rashed's blog
and moving over to Bullzip.
For more info use google to search for PDFCreator Malware