Brand new install of XP Pro, SP 3 and Reader 9.3 (Tried 8.2 - same results). Only when printing .pdf docs to a Canon iC D780 via a USB or Parallel cable does the user get the annoying Windows DEP error. I've already tried changing the DEP settings to no avail. The kicker is that he can print to an HP networked printer and does not get the error. I have downloaded and installed the latest drivers for the Canon printer. Why doesn't Reader play nice with a Canon printer?