I am having an unusual problem. I have always been able to drag files and folder from my desktop or explorer to the solution explorer in visual studio and add the files to m
You can't do this when your project is running. Is it?
I also cannot drop files from the explorer onto Visual Studio when it is running in admin mode.
But please try opening 'Add / Existing Item ... ' from the Solution Explorer / Manager context menu in Visual Studio and drag and drop files and folders from that window.
Works on my machine with Visual Studio 2012 ...
Windows will not let you drag from one window to another if only one of those windows is running as Administrator.
Are you running Visual Studio as Administrator?
In short : Run Visual Studio as Non Administrator.
I had the same issue and noticed I was pulling files from a folder that was compressed. I unzipped all the files and was able to drag and drop into the solutions explorer fine. Make sure your files are not in view mode in a compressed folder.