I CAN´T DOWNLOAD PDF DOCUMENTS

I`ve got Adobe Reader correctelly installed, but since a few days ago, when downloading a pdf document from internet (doesn't matter if from e-mail or web page), a message error appears and I can't see any pdf document.

However,I can see without any problem the pdf documents saved at the hard disk.

The same problem happens in the two PC of my home and in the iphone connected to the same wi-fi. I´ve uninstalled and re-installed Adobe Reader in one of the PC and the problem persists.

I'm afraid it is a problem from the wi-fi, but don`t know what to do.

Can you help me, please?