How do i import the revit libraries into revit 2013 architecture,mechanical and structural.WHEN TRY TO ADD A WINDOW MY LIBRARY BOTH METRIC AND IMPERIAL ARE EMPTY.

Me too but 211, and I lost all my template files, attempted a re dl but nothing! frustrating! 
Flick862012-04-27 14:36:13

try this...just copy your library (revit 2011) from the folder of library (revit 2013)...

I'm sorry, I can't answer.

if you have Revit 2011 or 2012 just copy the library from there into your new revit 2013 file.