I can browse the internet but can't download anything from it

I have a very weird problem.  I can browse the internet, I can write email and write to a forum (obviously).  But every time I try to download software I get a message saying I'm not connected to the internet.  I have also been trying to install Roxio CD Creator but it keeps telling me I'm not connected to the internet.  I tried to run Norton Power Eraser but again, I keep getting a message saying that I'm not connected to the internet and to check my connection and firewall.  I have Windows 10.  Could this be a problem with Norton 360?