When the computer exits from a power conservation mode (Standby or Hibernate), the Windows desktop is restored to the state it was in before it entered the mode.

Windows Vista has three main default power management modes:

Balanced

Power Saver

High Performance

Dell has added a fourth, Dell-Recommended mode that sets power management to the most typical settings for the majority of our customers. This is the active Power Plan.

Standby Mode

Standby mode is the default "off" state for Windows Vista. Standby mode conserves power by turning off the display and the hard drive after a time-out. When the computer exits from standby mode, it returns to the operating state it was in before it entered standby mode.

To set standby mode to automatically activate after a defined period of inactivity:

1Click Start and click Control Panel.

2Under Pick a category, click System and Maintenance.

3Under System and Maintenance, click Power Options.

The next dialog box shows three power plans the top option is Dell Recommended this is the currently active plan.

There is also a show additional plans arrow underneath the three power plans. You can have many power plans, but only three are displayed and the top one is the active plan.

To immediately activate standby mode without a period of inactivity, click Start , then click the off button icon. Windows Vista sets Standby as the default off state.

Setting Up and Using Your Computer

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Dell 531S owner manual Standby Mode, Balanced Power Saver High Performance