Hi Becky,
If you just want to return the notebook to its 'Factory Condition' ( ie. the condition it was in when first purchased ), it may be worth trying the following.
Shutdown the notebook.
Tap away at f11 as soon as you press the power button and see if this launches the Recovery Manager application - if it does, just follow the on-screen prompts to perform a Factory Reset. If there's data on the notebook that you want to keep, accept the option to back-up when asked.
Best regards,
DP-K