Live Update fails to Complete-NIS 2011 18.5.0.125

Recently when I boot my Computer Live Update (NIS 2011 Web Protection Updates Fail to Complete). Only if I run Live update again and get  Web Protection Definitions (Hub) to update and complete do Web Protection Updates complete. I'll try putting NIS 2011 on aggressive boot time protection . This stopped it from happening once before.....Thanks....Gorpy1