15 Useful Informationn Hard disk recoveryYou can reinstall the OS that was pre-installed at the time of purchase (Windows 8.1 or Windows 7).If reinstallation using the method described in “Remove everything and reinstall Windows” is not success-ful, follow the steps below.Preparationl Remove all peripherals.l Connect the AC adaptor and do not remove it until installation is complete.1 Start the Setup Utility.A Display “Charm”, and click - [Change PC settings] - [Update and recovery] - [Recovery].B Click [Restart now] under “Advanced startup”.C Click [Troubleshoot] - [Advanced options] - [UEFI Firmware Settings] - [Restart].Turn on the computer, and press F2 or Del while [Panasonic] boot screen is displayed.l If the [Panasonic] boot screen is not displayed, turn on the computer while holding down F2 or Del.l If the password is requested, enter the Supervisor Password.2 Write down all of the contents of the Setup Utility and press F9.At the confirmation message, select [Yes] and press Enter.3 Check the [UEFI Boot] setting of the Setup Utility.[UEFI Boot] should be set to as follows.When installing Windows 8.1 : [Enabled]When installing Windows 7 : [Disabled]4 Press F10.At the confirmation message, select [Yes] and press Enter.Computer will restart.5 Press F2 or Del while [Panasonic] boot screen is displayed.The Setup Utility starts up.l If the password is requested, enter the Supervisor Password.6 Select the [Exit] menu, then select [Recovery Partition] and press Enter.7Click [Next] and click [YES].Click [Reinstall Windows] and click [Next].8 At the License Agreement screen, click [Yes, I agree to the provisions above and wishto continue!] and click [Next].9 Click [Next].If the option is displayed, select the setting and click [Next].l [Reinstall Windows to the whole Disk to factory default.]Select this option when you want to install Windows to the factory default. After installation, you can create anew partition. For how to create a new partition, refer to “To change the partition structure” (è page 10).l [Reinstall to the OS related partitions.]*1Select this option when the hard disk has already been divided into several partitions and you want to keepthe partition structure. For how to create a new partition, refer to “To change the partition structure” (è page 10).*1 This does not appear if Windows cannot be installed to the recovery partition and the area usable by Windows.10 At the confirmation message, click [YES].11 Select OS (32bit or 64bit) and click [OK].12 At the confirmation message, click [YES].Installation starts according to the instructions on the screen. (It will take approximately 20 minutes.)l Do not interrupt installation, for example by turning off the computer or performing other operation.Otherwise installation may become unavailable as Windows may not start up or the data may be corrupted.13 When Ending process screen is displayed, click [OK] to turn off the computer.14 Turn on the computer.l If the password is requested, enter the Supervisor Password.