Hopefully you can help me in this because this problem has annoying me for a long time. it happens without regular, my sister's pc always freezes at the windows 8 classic welcome screen ,and if i hit ctrl alt delete it goes to the win 8 screen that ask you to log off or change users or cancel ,,if i hit ctrl ,alt cancel it will go to window screen with all the desktop icons and all is fine.

can anyone come up with some help in this? many thanks in advance.