I have runned APT-GET UPDATE for a root shell, downloaded all the files, install them. After this, i went for APT-GET -U UPGRADE again for a root shell, donwloaded all the files, install them.
Well, after this my box is incredible slow!!! Did I do something wrong? Is this normal? I mean, it is really slow, reboot, login, opening and closing programs, internet...
Are updates really necessary? Because if not, I will stick with the basic!
Thank You.

PS. Also, APT-GET -U DIST-UPGRADE after that.