Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to restore a computer to factory settings in windows 7 [title] Back up and save all important documents and files to an external disk, flash drive, or cloud storage system. [step] Restoring the original factory settings will erase all personal data from the computer. [title] Power off your computer and disconnect any extra accessories or peripherals.

Ending1: [step] This includes printers, scanners, network cables, and usb drives. [substeps] Remove your laptop from its docking station, if applicable. Ending2: [step] Connect any personal devices or software back to the data device. [title] Choose a low volume volume setting for a safe level of volume control. Ending3: [title] Remove all added hardware from the computer. [title] Remove small bits of plastic from the computer, like buttons, bolts, cords, or even a button remover. Ending4: [step] Most nokia computers support a back up mode during removal of the factory settings. [title] Remove and clear any residual data and software from your computer.

Answer format: ending1/ending2/ending3/ending4