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TLS THEME
Not possible

Convert TLS to THEME

Can you convert TLS to THEME?
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Is it possible to convert TLS to THEME?
No - not a direct conversion.

A .tls logon screen can't be meaningfully 'converted' to a modern Windows theme - Windows 10/11 dropped the reskinnable logon UI that TuneUp targeted. There's no path; use a current personalisation tool instead if you want to customise the lock/logon screen.

No direct path
Also to THEME: DESKTHEMEPACK · THEMEPACK

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Converting TLS to THEME

A .TLS file and a .THEME file hold different kinds of data, so there is no direct way to turn one into the other.

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

About these formats

.TLS TuneUp Utilities Logon Screen File

A TLS file is a TuneUp Utilities logon-screen theme - a package that TuneUp Styler used to replace the Windows welcome screen on XP, Vista, and 7. You apply it from within TuneUp Styler,…

Open .TLS details →
.THEME Windows Desktop Theme file

A .THEME file is associated with Windows Desktop Theme, a system file.

Open .THEME details →