To automatically put your computer on standby
Open Power Options in Control Panel.
In Power Schemes, click the down arrow, and then select a power scheme The time settings for the power scheme are displayed in System standby, Turn off monitor, and Turn off hard disks.
To turn off your monitor before your computer goes on standby, select a time in Turn off monitor.
To turn off your hard disk before your computer goes on standby, select a time in Turn off hard disks.
To open Power Options, click Start, click Control Panel, click Performance and Maintenance, and then click Power Options.
You might want to save your work before putting your computer on standby. While the computer is on standby, information in computer memory is not saved to your hard disk. If there is an interruption in power, information in memory is lost.
To create a new power scheme, specify the time settings you want, and then click Save As.
If you're using a portable computer, you can specify one setting for battery power and a different setting for AC power.
To put your computer on standby, you must have a computer that is set up by the manufacturer to support this option.
Using Power Options in Control Panel, you can adjust any power management option that your computer's unique hardware configuration supports. Because these options may vary widely from computer to computer, the options described may differ from what you see. Power Options automatically detects what is available on your computer and shows you only the options that you can control.