To help secure your computer, Windows requires a password to unlock the computer when it wakes from sleep. If there is confidential information on your computer, it's a good idea to protect that information with a password. You can change this setting if you don't want to enter a password every time your computer wakes. For example, if you're the only one who uses the computer at home, you may not want it to be locked every time it wakes.
If you turn off this setting, make sure that your screen saver password is also turned off. For more information, see Use your Windows password for your screen saver password.
Some settings are managed by your system administrator. For more information, see Why won't Windows allow me to change a system setting?
Use one of the following procedures to remove the requirement to enter a password when your computer wakes.
Open Power Options by clicking the Start button , clicking Control Panel, clicking System and Maintenance, and then clicking Power Options.
On the Select a power plan page, in the task pane, click Require a password on wakeup.
On the Define power buttons and turn on password protection page, click Don't require a password.
Click Save changes.
On the Select a power plan page, click Change plan settings under the plan that you want to change.
On the Change settings for the plan page, click Change advanced power settings.
On the Advanced settings tab, expand Additional settings, expand Require a password on wakeup, and then click No, both for when your computer is running on battery and when it's plugged in.