Reference errors - why and how to avoid them?

Using VS2013 TFS, MVC 5

after mapping a solution to a new machine and doing a get

all references are marked with warning yellow triangle with a red exclamation icon This includes EntityFrameWork, Web.Optimization  etc.

this requires updates installs (repeat n times) restart VS203 n times

finally it runs then JS and CSS require installs

VS2013 set-up is to do auto package restore

Why does this happen? How can this be prevented?

After mapping and getting the solution I expect the working solution to fire-up

Suggestions?