Toshiba Z30-B User Manual page 32

When you reinstall the Windows operating system, the internal storage
drive will be reformatted and all data will be lost.
Make sure that the AC adaptor is connected during the restoring process.
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User's Manual
Click Start -> Power and then select Restart.
Hold down 0 (zero) key and then release this key one second after the
computer is power on.
Select Troubleshoot -> TOSHIBA Maintenance Utility -> TOSHIBA
HDD Recovery.
Follow the on-screen instructions to finish the recovery.
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