There is only one file type that uses the .TLS extension:
TuneUp Utilities Logon Screen
Custom Windows logon screen used by Tune Styler, a desktop customization program included with TuneUp Utilities; may include a background image as well as custom fonts and buttons; overrides the default Windows startup screen when applied.
|AVG PC TuneUp Unlimited||Paid|
Updated: April 28, 2010