Today my Norton Antivirus 2011 quit functioning When I tell it to run live update i get C:\ProgramFiles(x86)Norton Internet Security\Engine\187.013\usitubexe Unspecified error. I downloaded this program online and do not remember where I stored the original receipt for the program. I purchased a year plus the trial time and have only had my laptop for a few months. How can I locate a site to restore the program and can they help me with locating my original receipt?