What is the default value of DisableStartupSound?

The Windows default of DisableStartupSound is 0. Frozen Tweaks sets it to 1, and switching the tweak off puts back the value you had before.

Is "Disable the Startup Sound" safe to switch on?

Cosmetic. The main cost: Nothing.

Switch the tweak off in Frozen Tweaks. Switching it off puts back exactly what was there before, value for value.

Is "Disable the Startup Sound" free in Frozen Tweaks?

Yes. It is one of the free tweaks, with no time limit.

DisableStartupSound 1: turning off the Windows startup sound

Frost LIVEWindowsFreeUndo: YesUpdated Oct 8, 2026View as Markdown

Short answer

Updated Oct 8, 2026

DisableStartupSound set to 1 stops Windows from playing its sound when it starts. In the registry it sets DisableStartupSound to 1 under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\BootAnimation.

In the app

Disable the Startup SoundFREE

Registry

HKLMSOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\BootAnimation

DisableStartupSoundYour previous value1

What the switch writes. Your current value may differ.

What it does

DisableStartupSound set to 1 stops Windows from playing its sound when it starts.

In the app the switch is called "Disable the Startup Sound", described there as: Turns off the sound Windows plays when it starts.

When it helps, and when it hurts

When it helps

A silent boot.

When it hurts

Nothing.

What it writes

Exactly what the switch changes, read from the app's source. Switching it off is what the app writes when you turn the tweak off again.

Registry values the switch writes.
Key and value	With the tweak	Switching it off
HKLMSOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\BootAnimationDisableStartupSound	1	Your previous valueSaved before the change, or deleted if there was none.Windows default: 0.

From the app's source (pack_extra.hpp), app 2.0.0, checked Oct 8, 2026.

The same change by hand

You do not need the app for this one. These commands make the changes from the table above. Run them in a Command Prompt opened as administrator, and make a restore point first.

Make the change · CMD

reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\BootAnimation" /v "DisableStartupSound" /t REG_DWORD /d 1 /f

Put it back · CMD

reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\BootAnimation" /v "DisableStartupSound" /t REG_DWORD /d 0 /f

See what it is set to now · CMD

reg query "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\BootAnimation" /v "DisableStartupSound"

How to undo it

In the app: Yes

Switching it off puts back exactly what was there before, value for value.

Switch the tweak off in Frozen Tweaks. The app saved what each value was before the change and writes exactly that back, or removes the value if it did not exist.

Changing several settings at once? The app's Make a restore point button, on every plan, makes a Windows restore point before you start.

Verdict

Cosmetic.

Questions

What does the "Disable the Startup Sound" tweak change in Windows?: In the registry it sets DisableStartupSound to 1 under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\BootAnimation.
What is the default value of DisableStartupSound?: The Windows default of DisableStartupSound is 0. Frozen Tweaks sets it to 1, and switching the tweak off puts back the value you had before.
Is "Disable the Startup Sound" safe to switch on?: Cosmetic. The main cost: Nothing.
How do I undo it?: Switch the tweak off in Frozen Tweaks. Switching it off puts back exactly what was there before, value for value.
Is "Disable the Startup Sound" free in Frozen Tweaks?: Yes. It is one of the free tweaks, with no time limit.

In the app