If you get real desperate, you can delete everything to factory setting. How to reset computer to factory setting www.top-password.com
To access it, follow these instructions:
Boot the computer.
Press F8 and hold until your system boots into Windows Advanced Boot Options.
Select Repair Cour Computer.
Select a keyboard layout.
Login as an administrative user.
At the System Recovery Options window, select Startup Repair.
Restore To Factory Settings – Guide for Windows XP, Vista, 7, 8, 10