When WinPower isn't printing, a safe and reliable solution can be found with CutePDF Writer. It is free.
To install CutePDF Writer, please run both CuteWriter.exe and converter.exe (links below)
Instructions after installation:
It may sound a little confusing at first, but once you understand it, it's rather simple. And it is a great relief to know there is a way to print, when in a pinch...
• After installing the two programs above, when you try to print from WinPower, "CutePDF Writer" will appear as a printer, in your list of printers.
• Select "CutePDF Writer" as the printer, and hit OK.
• You will then be asked to assign a name to the file. I suggest you save it as WinPower.pdf on the desktop so it's easy to find.
Obviously, you can assign more meaningful file names, and if you know how to navigate your system to find files, you may put the file wherever you wish... Hit 'Enter' on your keyboard to proceed.
• Once this is done, The next step is to really print to your printer. Open the new PDF file and print from there, this time using your real printer's name.
(For those who named the PDF file "WInPower.pdf" and put it on your desktop, please click the "WinPower.pdf" icon on your desktop, and once it opens, send it to print, with your real printer's name.)
Notes: This is one layer extra so it is kind of pain in a neck, except it's very reliable. So far, it has worked 100% of the time.
Also, a nice thing about it is that you can easily preview these WinPower documents before printing, so there should be no more wasted paper, with mistakes.