Please note that the Adobe PDF Printer functionality to create PDF files is only available with Adobe Acrobat (paid version), and not with Adobe Reader (free version).Solution 1Repair the Acrobat installation using the option in the Help menu.Solution 2Uninstall and then re-install Acrobat on your Windows OS.Solution 3Manually install the PDF PrinterClick Start > Control Panel > Devices and PrintersSelect Add a printerSelect Add a local printerCheck Use an existing port and select Documents\*.pdf (Adobe PDF) from the drop down. Click NextClick the Have Disk buttonClick the Browse buttonNavigate to C:\Program Files (x86)\Adobe\Acrobat 10.0\Acrobat\Xtras\AdobePDFSelect AdobePDF.inf from the list, then click the OK buttonYou will see many Adobe PDF Converters in the list, however count six down from the top and click Next (you may need to try this numerous times to find the correct Converter from the list that works with your version of Windows)Name your printer, e.g. Adobe PDFFollow the rest of the prompts and your PDF printer should now be installed correctlyIf you are later prompted for the ADPDF9.PPD file, it can be found in the C:\Program Files\Adobe\Acrobat 10.0\Acrobat\Xtras\AdobePDF\ folders.