How To Add A Custom Lock Screen Message In Windows 10

Let’s clear up a tiny Windows vocabulary crime right away: when most people say “custom lock screen message,” what they actually want is a message that appears before you can sign inright after the lock screen, when Windows is about to accept your password or PIN.

Windows 10 doesn’t include a built-in “type a note directly on the lock screen” feature like a sticky note slapped onto your wallpaper. But it does support an official, widely used sign-in banner (often called a “legal notice” or “logon banner”) that pops up and requires the user to click OK before logging in.

The good news: you can use that banner for more than legal warnings. It can be practical (lost laptop contact info), helpful (IT support instructions), or even politely threatening (a reminder to stop downloading “TotallyNotAVirus.zip”).

What You’ll Get (And Where It Shows Up)

After you set it up, Windows displays a dialog box with a title and message text right before the sign-in screen accepts credentials. The user must acknowledge the message to proceed.

Think of it as: Lock screen ➝ press a key/mouse ➝ sign-in prompt ➝ your message (OK) ➝ sign-in continues. Exact timing can vary slightly by device configuration, but it’s always part of the sign-in flownot a permanent overlay on the lock screen background.

Before You Start: Quick Checklist

• Admin rights: You’ll need a local administrator account.
• Windows edition matters: Windows 10 Pro/Enterprise/Education has policy editors; Home usually requires the Registry.
• Keep it short-ish: Long messages can be annoying, and some environments may truncate or display oddly.
• Be smart about privacy: Don’t display sensitive personal data (like full addresses) on a screen anyone can see.
• Backup if using the Registry: Don’t freestyle registry edits like you’re defusing a bomb with a spoon.

Method 1 (Best for Windows 10 Pro/Enterprise/Education): Local Security Policy

If you’re on Windows 10 Pro (or higher), this is the cleanest, most “Windows-approved” way to configure the message on a single PC.

Step-by-step

1. Press Windows + R, type secpol.msc, then press Enter.
2. Go to: Security Settings ➝ Local Policies ➝ Security Options.
3. Find and open: Interactive logon: Message title for users attempting to log on.
4. Enter a title (example: “Lost Device?” or “Authorized Use Only”), then click OK.
5. Find and open: Interactive logon: Message text for users attempting to log on.
6. Enter the message text, then click OK.
7. Lock your PC or sign out to test it.

Example messages that don’t sound like a corporate robot

• Title: If Found
• Text: This computer is lost. Please email [email protected]. Thank you!

• Title: Friendly Reminder
• Text: Save your work. Don’t click suspicious links. And yes, IT can see the printer queue.

Pro tip: Set both title and text

In many real-world setups, the message is more reliable when you define both the title and the text. If you set only the text and nothing shows up, don’t panicadd a title too and test again.

Method 2 (Pro/Enterprise/Education): Local Group Policy Editor

This method is extremely similar to Local Security Policy, but it’s the same configuration route you’d use in a domain environment. It’s also handy if you’re more comfortable with Group Policy paths.

Step-by-step

1. Press Windows + R, type gpedit.msc, then press Enter.
2. Navigate to: Computer Configuration ➝ Windows Settings ➝ Security Settings ➝ Local Policies ➝ Security Options.
3. Open: Interactive logon: Message title for users attempting to log on and set your title.
4. Open: Interactive logon: Message text for users attempting to log on and set your text.
5. Click OK, then sign out/lock to verify the banner appears.

If your PC is managed by work or school

If your device is joined to a domain or managed by IT (Group Policy, MDM/Intune, etc.), your changes may be overwritten. In those environments, the message is usually set centrally (which is greatunless you were trying to be funny on a shared workstation).

Method 3 (Works on Windows 10 Home Too): Registry Editor

Windows 10 Home typically doesn’t include Local Group Policy Editor or Local Security Policy tools by default. The workaround is to set the same values through the Registry.

Important safety note

Editing the Registry is safe when you know what you’re doing and terrifying when you don’t. Create a restore point if you’re cautious, and edit only the keys described below.

Step-by-step

1. Press Windows, type regedit, right-click Registry Editor, and choose Run as administrator.
2. Navigate to this key:

3. In the right pane, look for these string values (type: REG_SZ):

• legalnoticecaption (this is the title)
• legalnoticetext (this is the message body)

4. If one doesn’t exist, create it: Right-click ➝ New ➝ String Value, then name it exactly as above.
5. Double-click legalnoticecaption and enter your title.
6. Double-click legalnoticetext and enter your message text.
7. Close Registry Editor and sign out (or restart) to test.

How to format line breaks nicely

Want your message to look like a human wrote it (instead of one giant paragraph blob)? The easiest approach is to draft the message in Notepad with line breaks, then copy/paste into the legalnoticetext value. Many systems preserve those line breaks in the dialog box.

Optional: PowerShell approach (useful for IT admins)

If you’re managing a few devices and want repeatable setup, PowerShell can set the same Registry values. Here’s a simple example:

Note: In PowerShell, `n adds a new line.

How to Remove the Message (Undo / Roll Back)

If you used Local Security Policy or Group Policy Editor

1. Go back to the same “Interactive logon” settings.
2. Clear the text (or set the policies to Not Defined if that option is available).
3. Lock/sign out to confirm the banner is gone.

If you used the Registry

1. Return to:

2. Either clear the values of legalnoticecaption and legalnoticetext, or delete those values entirely.
3. Sign out or restart to confirm.

Troubleshooting: When Windows Refuses to Cooperate

“I set it, but nothing shows up.”

• Set both the title and the text. Some configurations are pickier if only one is defined.
• Check your Windows edition. If you’re on Home, policy tools may not apply.
• Sign out (or restart) to test. Locking works sometimes, but sign-out is more reliable for verification.
• Work-managed device? Your organization may override local settings with a domain policy or MDM profile.

“I removed it, but the message still appears.”

• A domain or MDM policy might still be applying it. If your PC is managed, the banner can come right back after policy refresh.
• Look for multiple configuration sources. For example, a Group Policy setting can re-populate the Registry values.
• Use a policy result check (advanced). On managed systems, tools like gpresult can help identify which policy is enforcing it.

“My message is cut off / truncated.”

• Shorten the message and move long content (like full acceptable-use policies) to an internal web page or intranet reference instead.
• Use clearer formatting: short paragraphs, fewer lines, and no novel-length disclaimers.

Best Practices for a Great (and Not Annoying) Sign-In Message

• Write for the reader’s patience: One screen. A few lines. Clear purpose.
• Include action: If it’s “If found,” include a single email or phone number. If it’s “Authorized use only,” keep it firm but readable.
• Avoid sensitive info: The sign-in message is visible to anyone holding the device.
• Keep humor appropriate: “Smile, you’re on camera” might be funny at home, but questionable in regulated environments.
• Get approval in business settings: If the message is legal/audit related, it should match your organization’s compliance requirements.

Examples You Can Steal (You’re Welcome)

Lost device / return instructions

Title: If Found

Text: This device is lost. Please contact IT at (555) 010-2020 or email [email protected]. Thank you.

Home PC reminder

Title: Family Computer

Text: Please don’t install “free” games from sketchy websites. If the browser starts speaking in pop-ups, tell an adult.

Small business security notice

Title: Authorized Use Only

Text: This computer is for authorized users. Activity may be monitored. If you are not authorized, disconnect now.

Extra : Real-World “Experiences” People Commonly Run Into (So You Don’t Have To)

Since Windows customization is never just “click a button and ride into the sunset,” here are a few real-world scenarios that come up all the time when people try to add a custom lock screen (sign-in) message. These are practical, field-tested patternsbasically the stuff you learn after the second time you mutter, “Why is it still showing the old text?”

1) The “Lost Laptop” message that actually gets the laptop back

One of the smartest uses of a sign-in banner is simple return info. People often start with an essay (“Dear Finder, I am but a humble owner…”), but the message that works best is short, polite, and actionable: one email address, maybe one phone number, and a thank-you. The best part is that it doesn’t rely on someone unlocking the device (which they can’t do anyway). They see the message and immediately know what to do next. The most common improvement people make after round one: removing extra details that accidentally expose personal information. Your sign-in banner should never reveal your full address, your schedule, or anything that helps a stranger learn more about you than they need to return the device.

2) The “Why won’t it go away?” mystery (a.k.a. policy is still applying)

A classic: you clear legalnoticetext and legalnoticecaption, reboot, and the message still pops up like it pays rent. In many cases, the computer is managed by an organization, and a Group Policy or MDM profile re-applies the banner during the next policy refresh. The telltale sign is that you remove it successfully… and then it reappears later. The fix isn’t to fight harder in the Registryit’s to find the source: check whether the device is domain-joined, whether your company uses device management, and whether the banner is part of a compliance baseline. Once you know the “parent setting,” removing it becomes straightforward.

3) The “I tried to be funny at work” lesson

At home, a sign-in message like “Welcome back, Commander of Snacks” is harmless. At work, humor can backfire fastespecially if your banner is meant to be a legal notice. People learn (sometimes the hard way) that corporate login banners are often used to support security policies, auditing warnings, and acceptable-use reminders. So the best “experience-based” advice here is: if this is for a business environment, keep the message professional, approved, and aligned with policy. Save the jokes for the desktop wallpaper where HR is less likely to appear behind you like a stealth ninja.

4) The formatting rabbit hole

Many people want multi-paragraph formatting, bullet points, and perfect line breaks. Windows sometimes cooperates, but the dialog box isn’t designed for fancy typography. The easiest win is to draft text in Notepad with clean line breaks and paste it in. If it still looks cramped, shorten it. The banner is a “front door sign,” not a full onboarding manual. For longer content, use a short banner plus a pointer (“See company policy portal”), especially on managed devices.

Conclusion

Adding a custom “lock screen message” in Windows 10 is really about enabling the built-in sign-in banner (legal notice). On Pro/Enterprise/Education, you can set it neatly using Local Security Policy or Group Policy Editor. On Home, the Registry method gets the job donejust carefully.

Keep your message short, clear, and helpful. Whether it’s a security reminder, a lost-device return note, or a gentle warning to your household that “free toolbars” are not, in fact, a lifestyleWindows will happily display it before anyone signs in.