To restore your Windows 7 computer to factory settings. 1  Back up important files and data. 2  If you do not back up your files, you will lose them. 3  Turn off your computer. 4  Disconnect everything but the monitor, keyboard and mouse.5  This includes your: 6  scanner. 7  printer.8  modem or network cables.9  mobile phone and tablet.o restore your Windows 7 computer to factory settings. 1  Back up important files and data. 2  Turn off your computer. 3  Disconnect everything but the monitor, keyboard and mouse. 4  scanner. 5  printer. 6  modem or network cables. 7  mobile phone and tablet. 8  USB flash drive or other external hard drive. 9  If your laptop is docked, remove it from the docking station. 10  W