VS2012 All packages(Nuget) are already installed and there is nothing to restore

VS2012 All packages(Nuget) are already installed and there is nothing to
restore

I was debugging a project when my computer crashed with a blue screen.
After the crash I had to recover my files from a backup. My computer was
restored to its original settings. Then I started to get the following
errors when compiling
NuGet package restore started.
All packages are already installed and there is nothing to restore.
NuGet package restore finished.
HRESULT: 0x80070057 (E_INVALIDARG)
So I googled for the error and according to instructions deleted files
from Temp and ASPWEBADMIN folders. This solved the HRESULT error and my
project is running normally except that when I compile and debug any
project I still get the NUGET package restore. I googled for solution and
landed on this Link. But I am not sure how to use this link. I want to
know 1) Is this Build Output a problem? (If it aint broke dont fix it) 2)
If it is a problem do u know any solution.