why does my pc not shutdown..i have win xp ..wen i shut it down ..it appears windows shutting and it does not shutdown ...its gets hanged....and im using a laptop..so i have to remove d battery to shut it down...this is annoying....wat to do..and wen i press shutdown ..and non responsive program appears asking to end now..and i press end now...and program is lenovo energy cut...i have even tried to uninstall the program but its does not uninstall..help plzzz