Hi Roger,
Thank you for choosing to post your question in the Microsoft community.
I understand that you unable to print PDF’s on your Windows 8 computer. It would help to understand the issue even better if you could answer these questions.
a. Does the issue only while trying print PDF’s? Are you able to print from other applications?
b. Did you make any changes to the computer prior to the issue?
c. Is there any error code or message displayed when it fails to print?
d. What is the make/model of the printer?
Method 1:
Check for compatibility
I would suggest you to refer to the link for checking Windows 8 Compatibility for the printer.
http://www.microsoft.com/en-us/windows/compatibility/win8/CompatCenter/Home?Language=en-US
If it not compatible, I would suggest you to install the software and drivers in Windows 7 compatibility mode and check if the issue persists.
Reference:
Get your apps and devices working in Windows 8:
http://windows.microsoft.com/en-US/windows-8/get-apps-devices-working
Method 2:
Install a printer
http://windows.microsoft.com/en-US/windows-8/install-a-printer
Method 3:
How to solve printing problems in Windows
http://windows.microsoft.com/en-US/windows-8/how-to-solve-printing-problems
Hope it helps.