Hello, I am new to the forums, so I hope I can find some answers!

I was running pd on Windows 7 no problem, but now I have upgraded to a Windows 8 operating system and am having some troubles. If I open the application it works fine except I get an extra message box (attached image). However, double clicking on a pd file will do nothing and it does not recognize what program to open it with. I have tried to make it a default program to open the file type, but with no success.

Is anyone else having the same problem? I would love this to get figured out as I am using it for a university class. Thanks!

http://www.pdpatchrepo.info/hurleur/pd_problem.png

I would say the extra popup isn't to worry about.
It's the command line used to start puredata.

About .pd files not being recognized, are you talking about your normal file explorer ? If so, the deal comes from Windows, not from Puredata, and you have to make the association yourself between .pd files and puredata, in some Explorer menu I can't tell you about exactly since I don't have Windows.

I've never used Windows 8, but are you sure you ran the Windows Installer version (i.e. the top item at http://puredata.info/downloads/pd-extended rather than getting the "Run anywhere" .zip file (the second item)?