Charms > Settings > Change PC Settings > Windows Update
They should re-start.
Just sits on preparing to install for quite awhile. Progress is only about 10 percentage or so.
Sometimes updates get halted when one has been installed and a reboot is required. Have you tried restarting your Surface?
I understand RT is different but I will weed through it to learn what I can. So far, switcher apps and the switcher pane and moving around. And the metro and desktop personas.