My up touchsmart desktop is having a start up problem.?

When I turn it on it goes to the start screen and stays there not finish booting up or anything. There are 4 options that I can choose from by pressing keyboard ons. F10=Setup, F11=System Recovery, Esc=Boot Menu, F9=Diagnostics. When I press F11 and F9 they do nothing. And when I press the others they say starting setup or boot menu and still do nothing. Help!!!!!