16Useful InformationInstalling Software15 Perform the “First-time Operation” (è page 9).NOTEl The date and time, and the time zone may not be correct. Be sure to set them correctly.16 Start the Setup Utility and change the settings as necessary.17 Perform Windows Update.18 Clear TPM (è page 14).n Using Recovery DiscUse the Recovery Disc in the following conditions. You have forgotten the administrator password. Installation is not complete. The recovery partition in the hard disk may be broken. To change OS from Windows 7 to Windows 8.1, or vice versa.NOTE To change OS from 32 bit to 64 bit, or vice versa, install OS using the recovery partition in the hard disk.Preparationl Prepare the following items: Recovery Disc (è Reference Manual “Recovery Disc Creation Utility”) USB DVD drive (optional) (refer to recent catalogs and other sources for information about the productsavailable)l Remove all peripherals (except for the USB DVD drive).l Connect the AC adaptor and do not remove it until installation is complete.1 Connect the DVD drive to the USB port.2 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.3 Write down all of the contents of the Setup Utility and press F9.At the confirmation message, select [Yes] and press Enter.4 Check the [UEFI Boot] setting of the Setup Utility.[UEFI Boot] should be set to as follows.When the recovery disc for Windows 8.1 is used : [Enabled]When the recovery disc for Windows 7 is used : [Disabled]5 Set the Recovery Disc into the DVD drive.6 Press F10.At the confirmation message, select [Yes] and press Enter.Computer will restart.7 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.8 Select the [Exit] menu, then select your DVD drive in [Boot Override] and press Enter.The computer will restart.9 Click [Reinstall Windows] and click [Next].10 At the confirmation message, click [YES].11 At the License Agreement screen, click [Yes, I agree to the provisions above and wishto continue!] and click [Next].