mhydra

What do you mean with "separate session". When you log on to your computer the session will start up automatically. If you log on and want to log as a different user just use one of kde or gnome applets for this. GNOME has "fast-user-switch-applet".

Control center is trying to install some packages for properly working network service. You just could specify the source of packages, a CD, DVD, http url, ftp url, online repository... So, just go to source section and make sure there is a DVD source of packages. Then you could install some packages from DVD via software control section of the control center. When you add "a new connection" just put your install DVD in the DVD-rom and control center automatically will detect needed packages and sources.

@carl I can suggest you to take a look about your firewall instead of anti-virus software. If you want to feel safe just increase your security with good firewall rules. Really there are not known viruses for linux. All these anti-virus applications detect mostly ordinary windows viruses. If you want I san suggest you perfect Intrusion detection tool - AFICK. This tool detect every access to your files and folders.

You can you xawtv or some other tv software. Here you are more information XawTV

Why do you use virus scanner for Linux? There are no any working viruses for Linux. ehh except the 2 last viruses that required change of the kernel for their effective start. :D Do you run this Avast as root user? If you run it like an ordinary user there is no possibility to reboot your computer except hardware error and incompatibility.