Winlogon is the component of Windows Client Authentication Architecture within Microsoft Windows that is responsible for handling the secure attention sequence.

Winlogon process is responsible for:

  • Microsoft Windows station and desktop protection
  • loading your user profile into the Windows registry which allows programs to use the keys under HKEY_CURRENT_USER and is different for each Windows user account.
  • Screen saver control
  • Standard Secure Attention Sequence (SAS) events recognition
  • Assignment of security to user shell
  • optionally locking the computer when a screensaver is running
  • Multiple network provider support

The actual obtainment of user credentials and Authentication is performed by other components within the Windows Client Authentication Architecture.

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