Reset back to factory settings

It all really depends on what OS your running. If your on windows 8/10 you can hold down the shift key while you click on Restart. Let it restart while still holding shift key and you should be see a blue screen with advanced options. From their you can reset/restore your device. If it is windows 7 or lower you can usually press either F4 or F8 when you power on your device and it will take you to a Restore screen.