About the security...
 

Where is the security-up-to-date thing on fedora?
The thing, where I am assured that the Os is kept sicure.

Thanx...

there should be a little green check mark or red exclamation point in the system tray area indicating that your box is updated or not. If it's not there, open a terminal and type
su
password: (your root password)
yum update

This will find all the relevant updates and ask you if you want to install. Should be painless.

If the red/green thing is in the system tray click on them and run the "Up2date" program. Both do the same thing.

If you want the wizardy thing, it's at /usr/bin/up2date