I have tried that too based on some suggestions I found through googling.
This may contribute to the issue, just noticed it now, after I restarted my VS and opened the Package Manager console I got the ff:
Each package is licensed to you by its owner. Microsoft is not responsible for, nor does it grant any licenses to, third-party packages. Some packages may include dependencies which are governed by additional licenses. Follow the package source (feed)
URL to determine any dependencies.
Package Manager Console Host Version 1.4.20609.9012
Type 'get-help NuGet' to see all available NuGet commands.
File contains corrupted data.
PM> install-package mvcprojectawesome
I am just wondering why others would install though.