I am unable to install software, I'm getting this message. Unhandled exception has occurred in your application. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will close immediately. Could not load file or assembly "System.Core, Version =3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" or one of its dependencies. The system cannot find the file specified. Please advice