Panasonic CF-19 Series Operating Instructions Manual page 17

If high-frequency sound occurs around keyboard while using the computer
This symptom is mitigated by changing the settings for the USB power saving function.
A standard user needs to enter an administrator password and click [OK].
Set [USB selective suspend setting] to [Enable].
A Click (Start) - [Control Panel] - [System and Maintenance] - [Power Options].
B Click [Change plan settings] of the current power plan.
C In [Change settings for the plan:], click [Change advanced power settings].
D In [Advanced settings], double-click [USB settings].
E Double-click the displayed [USB selective suspend setting].
F Change settings of [On battery:] and [Plugged in:] to [Enabled].
G Click [OK] and exit the [Advanced settings] screen.
Windows Update
You can update to the latest patches and service packs for Windows with the following menus.
(Start) - [All Programs] - [Windows Update]
Do not apply "Driver Updates" even if a message to update a driver appears. If a driver update is required,
contact your technical support offi ce.
If the message "Check your computer security" is displayed
Select (red icon) on the notifi cation area and make the appropriate settings. The Windows Security Center
regularly gives you notice so that you can make the optimum settings. This is not an error message and you can
use the computer. However, making appropriate measures is recommended to reduce the risk of virus and other
attacks.
17