A laptop computer is typically set to conserve battery power. One of the common settings called standby, sleep mode or hibernation turns off power to the screen and the laptop itself after a preset time limit passes without any mouse or keyboard activity. It can be inconvenient for the computer to shut down while you're working on an open page or during a download. Change the setting if you don't want your laptop to going into automatic shutdowns.
Turn the laptop computer on with the power button if it's not set to turn on upon opening. Allow the system to boot up. Open the panel for adjusting the sleep settings. This varies among the popular versions of Windows operating systems.
To change the sleep mode setting on a laptop running Windows XP, click the "Start" button, and click the "Control Panel" selection. Choose the "Performance and Maintenance" selection, and click on "Power Options." Click the "Power Schemes" tab, and click the drop downs next to "Turn Off Monitor," "Turn Off Hard Disk," "System Standby" and "System Hibernates." Select "Never" for each drop down in both the "Plugged in" and "Running on Battery Power" columns. Click the "Hibernate" tab and click to remove the check mark in the box next to "Enable Hibernation."
To change the sleep settings on a Windows Vista laptop, click "Start," "Control Panel," "Systems and Maintenance" and "Power Options." Then click "Change Plan Settings" under the currently established plan. Click on the "Advanced Settings" tab and select the "Never" option on the "Sleep," "Sleep After," "Hibernate After," "Display" and "Turn off Display After" drop downs. Click the "OK" and "Save Changes" buttons to confirm the settings.
To change the sleep settings on a laptop running Windows 7, click the "Start" button, choose "All Control Panel Items," select "Power Options" and click "Edit Plan Settings." Click the drop downs for "Turn off the Display" and "Put the Computer to Sleep." Choose "Never" for both and click the "Save Changes" button.
Windows will refer you to the manufacturer's power management feature if the model is governed by such. Click the maker's "Power Management" icon to adjust the sleep, standby and hibernate settings to "Never," and the Windows Power Options settings will conform.