If the system isn't booted How can any update commands be useful?
Anyway, after consulting with a few long time pclos users, who said Gnome is much more stable,and probably wouldn't have had the problem, I had this before without any sigle package update ,it just happened after an idle time, i decided to dwnload install Gnome.I'll keep the suggestions for future reference,Thanks to all who gave me their time and attention.