VS2015 nuget package manager not finding packages

Question

I installed VS2015 Update 2 and now nuget package manager does not find any packages outside of the \"Microsoft and .net\" package source. It looks like the nuget package so

Answer 1

I am on Visual Studio 2015 Community Update 3. I had this problem. What worked for me is: open the Nuget.config file, and change the https to http.