Networking :: NIC not recognized and more

Hi,

If someone can help or tell me where I could find the answers I would be really gratefull... I have been working with Windows for 20 years and am trying to pass to Linux... not so easy...

1. I would like to have a login screen so I can lock the computer when I leave the office. How to do that?
2. I installed GTK2 in order to use so applications that need it but I can't use the applications until I click on "Update_to_GTK2". I have to do that each time I start DSL. Is it normal and is there a way to avoid clicking each time on that shortcut ?
3. DSL 2.0 recognizes my network card but version 3.0.1 doesn't so I'm stil using version 2.0 unfortunately.

Thanks a lot for your help.

Jo

original here.