To manually set the power options in Windows XP so that you are not prompted for a password when your computer resumes from standby, follow these steps:
Click Start, click Run, type powercfg.cpl, and then click OK.
Click the Advanced tab.
Click to clear the Prompt for password when computer resumes from standby check box.
Windows will not prompt you for a password when the computer resumes from standby. If you want to be prompted for a password, click to select the Prompt for password when computer resumes from standby check box.
Did this fix the problem?
Check whether the problem is fixed by resuming the computer from standby. If you are not prompted for a password, you are finished with this article. If the problem is not fixed, you can contact support.