Sony VGC-RM1 - Manual (Page 105)

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Upgrading Your VAIO Computer
Resetting the Computer's Date and Time
To reset the computer's date and time
1 Click the time readout displayed on the taskbar.
The window appears showing the current date and time.
2 Click Change date and time settings.
The Date and Time window appears.
3 On the Date and Time tab, change the settings as desired.
4 Click Apply.
5 Click OK.