Dunno, but just two days ago I was having trouble with Netscape. The service provider said it could have been corrupted. He helped me install Navigator 4.79, and the trouble (difficulty in connecting to sites) disappeared. I had vers. 4.78. There is a new 4.80, but the technician said they haven't fully tested it to see if there are any glitches, and to wait a while before asking for that one.