When you double-click an Adobe PDF file, the Adobe Download Manager window appears, and the Download Manager returns the error "The download cannot continue. Error parsing voucher."
Solution: Associate PDF files with an Adobe Acrobat product.
To associate a PDF file with an Acrobat product (such as Acrobat 6.0 or Adobe Reader): 1. In Windows Explorer, do one of the following: Right-click a PDF file (Windows XP, 2000) Shift+right-click a PDF file (Windows NT, Me) Click a PDF file to select it, and then Shift+right-click the file (Windows 98) 2. From the pop-up menu, choose Open With (Windows 2000, NT, Me, 98), or choose Open With > Choose Program (Windows XP). 3. In the Open With dialog box, select an Acrobat product from the list. 4. Select Always Use This Program to Open This Type of File (Windows XP) or Always Use This Program to Open Files of This Type (Windows 2000, NT, Me, 98). 5. Click OK.
When you install an Acrobat product, that product becomes associated with the PDF file format. When you double-click a PDF file, the Acrobat product opens and displays the PDF file.
If the PDF file format becomes associated with the Download Manager, the Download Manager opens and attempts to display PDF files when you double-click them. The Download Manager enables you to download products and product updates from the Adobe Web site, but it can't display PDF files.