Adobe Acrobat XI pro will not print multiple files on new windows 10 desktop?

the best answer I have received is the following....

bulk printing via Windows:

1. To print all of the files in a folder, open that folder in Windows Explorer (File Explorer in Windows 8), press CTRL-a to select all of them, right-click any of the selected files, and select Print.
2. Try opening up the printer from the Devices and Printers option on the Start menu (or search for your printer by name). Drag the relevant files onto the printer window, and you'll see a dialog box asking if you want to print multiple files. Click 'Yes' and they'll all be opened and printed in their entirety, with the default settings.

if you have windows 10 and want to print more than 15 documents at a time.... you will need to follow the following steps first.... to change the registry.

There is a limitation in Windows that prevents users from printing more than 15 files at a time. Good news is that there is a workaround, but the bad news is that it's a little complicated in that it requires edits to the computer's registry. 

Below are the instructions (you need administrator access to the computer your working with):

1. 1. Get to the "Run" menu. (Go to the start menu, and type Run and click enter, or hit Windows Key + R to display the same dialog)
2. 2. Type Regedit.exe and click OK
3. 3. Navigate to the following area
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
   
   4. In the right side pane, Right Clickand select New/ DWORD (32-bit) Value.
4. 5. Name the Value  MultipleInvokePromptMinimum (Case sensitive).
5. 6. Right click the new Value and select Modify.
6. 7. In the Base section, select Decimal.
7. 8. In the Value Data box, type the number  16  and Click OK (The number 16 will make the selection of files Unlimited).

Press the F5 key to refresh and exit the registry editor.