Why can't I open attachments, PDFs - Office 2007 & Win 10?

[Windows Central Question]

Can't open attachments, PDFs - Office 2007 & Win 10

I have Office 2007 and win 10 and can't open attachments and .PDFs All the links and help I've seen work for later versions of Office or apply to earlier OS. Any suggestions? If I copy the attachment to the desktop I can open them from there