Just a heads up that there is currently a nasty exploit on PDF files doing the rounds. It’s based on a vulnerability in Adobe PDF Reader / Acrobat 9.2 and lower, and can act through browser plugins.
The best protection is to avoid any untrusted PDF files. Most antivirus software does not detect affected PDFs as of yet. Failing that, DEP affords some protection – if it’s available to you its likely already turned on. Outlook users should be sure that Outlook isn’t set to automatically preview PDF files, this might trigger the exploit.