Are you saying that you only have the root account, no other users? This is a very bad habit, as any kind of file change or file deletion could cause major damage to the filesystem.
I strongly advise that you create a regular user account for your day to day work.
Disclaimer : I don't use Mandriva as of now. Got that inform from here http://static.howtoforge.com/images /the_perfect_desktop_mandriva_2010.0_gnome/big/36.jpg