That would indicate something s trying to load but can't. Switch off and try pressing Function 8 continuously to get into Safe Mode. To make sure it does turn off, remove the battery and take out the mains electric plug.
In Safe Mode, press the Windows key and R together then in the Run box, type msconfig
and hit Enter.
In the StartUp tab, untick everything that comes on when the machine start then click Apply and OK your way out. Restart as requested and a clean start might work and if it does, the Event Viewer in Control Panel>Administrative Tools might tell you which programme was causuing startup problems.