1. Download Nod32 Offline Updates which i have previously posted.
2. Create Folder In your hard drive suppose C:/update and Extract Downloaded nod32 Offline update there.(C:/update)
3. Open your Nod32 and open Setup > Advance Setup Option. Or press F5 buttom to open Advance Setup option.
4. Now click on Update and Edit Update Sever. Type C:/update and Add it to Update Server and Press OK.
5. Click Update Option from main window of Nod32 and now u can update full virus signature database.
enjoy and good luck.