Panasonic Toughbook CF-Y5LWEZABM Operating Instructions Manual page 26

Reinstalling Software
12 Press .
F9
At the confirmation message, select [Yes] and then press Enter.
The Setup Utility settings excluding the password(s) will return to the default values.
13 Press .
F10
At the confirmation message, select [Yes] and press Enter.
The Setup Utility will close, and the computer will restart.
14 Perform the first-time operation (
15 Start the Setup Utility and change the settings as necessary.
16 Perform Windows Update.
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page 14).