Since upgrading from Reader 8 to Reader 9, Windows XP users are no longer able to right-click 1 or more PDF files from Windows Explorer and choose either "Print" or "Open with Adobe Reader...". Those options are no longer listed in the right-click menu. We have experienced this on several computers. I downgraded a PC to Reader 8, and these options re-appeared, then disappeared again when I upgraded back to Reader 9.
Could you tell me which version of Reader 9 you are installing?
Please give the exact version it is showing you from Help | About Adobe Reader.