I purchased Norton system works in October 2005 for my Toshiba Laptop. I have experienced that the update will eventually state that it has an error, and when I research, after manually trying to Update the file from Symantec website, they just say I have to uninstall and then reinstall. This will be the 3rd time. So I won't put my machine through that again, so I am going elsewhere, unless someone else is aware of a fix. Thanks