A simple to fix, yet annoying problem, especially for a Windows Media Center computer. After waking up from sleep or hibernation, Windows asks you to log in with your user-name and password. While this is a very good security measure for a work computer, for your home computer or more important, your HTPC configured to be used without a keyboard, it could be annoying. A simple configuration will enable auto-login after wake-up.
1. Open Control Panel->Power Option Dialog (Go to Start->Settings->Control Panel->System and Maintenance or Start->Programs->Accessories->System Tools->Control Panel->System and Maintenance). After opening, Click Require a password on wakeup.