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How to Prevent New Outlook from Installing on Windows 11 (2 Methods)

Tutorial on how to block new Outlook installation on Windows 11 using Registry Editor

To prevent New Outlook from installing on Windows 11, delete the OutlookUpdate registry key at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe. Removing that key strips out the Windows Update instruction that silently pushes New Outlook onto your PC. If New Outlook is already installed, you can remove it with a reg delete command as well.

Applies to: Windows 10 (22H2) and Windows 11 (23H2, 24H2, 25H2) | Last updated: May 27, 2026

How to Prevent New Outlook From Installing on Windows 11

Key Takeaways

  • Windows 11 silently installs New Outlook through Windows Update using a registry key called OutlookUpdate under the UScheduler_Oobe path — deleting it removes the installation instruction.
  • On Windows 10, the block works differently: instead of deleting the key, you create a BlockedOobeUpdaters string value inside OutlookUpdate and set it to ["MS_Outlook"].
  • If New Outlook is already installed, a reg delete command targeting the OutlookUpdate key followed by uninstalling from Settings will cleanly remove it.
  • Microsoft can recreate the OutlookUpdate key through future update packages — if New Outlook reinstalls, simply repeat the fix.
  • Winhance can automate this block and handle other unwanted app installations in one place, without manual registry edits.

Quick Steps

  1. Press Windows key + R, type regedit, and press Enter to open Registry Editor
  2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe
  3. Right-click the OutlookUpdate subkey in the left panel and click Delete, then confirm with Yes
  4. Close Registry Editor and restart your PC
  5. Or run the one-liner below in an elevated Command Prompt to do it in one step

In This Guide

This guide covers two scenarios for stopping New Outlook:

Why Does Windows 11 Keep Installing New Outlook?

Microsoft uses Windows Update to silently push certain apps onto your PC, and New Outlook is one of the most persistent examples of this. It gets bundled into regular update packages and installs itself in the background — no prompt, no choice, it just appears. I’ve seen this on dozens of machines, including fresh installations that hadn’t even been used yet.

The mechanism is a registry key called OutlookUpdate inside the Windows Update Orchestrator’s UScheduler_Oobe folder. This key acts as an instruction to Windows Update: install New Outlook next time updates run. Deleting the key removes the instruction entirely. It’s the same tactic Microsoft uses for Dev Home — I covered how to block Dev Home installation using an identical approach.

If you want a broader solution that blocks multiple unwanted apps and keeps your system clean after updates without digging through the registry each time, Winhance is a free tool I built that handles all of this in one place. But for just stopping New Outlook, the steps below are quick and reliable.

Method 1: Block New Outlook from Installing

Step 1: Open Registry Editor

Press Windows key + R on your keyboard to open the Run dialog. Type regedit and press Enter. If a User Account Control prompt appears, click Yes to open Registry Editor with administrator privileges.

Step 2: Navigate to the UScheduler_Oobe Path

Click in the address bar at the top of Registry Editor and paste the following path, then press Enter:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe

This takes you directly to the folder containing the OutlookUpdate key. Always paste rather than navigating manually — it’s faster and avoids the wrong branch.

Step 3: Delete the OutlookUpdate Key

In the left panel, look for the OutlookUpdate subkey. Right-click on it and click Delete. A confirmation dialog will appear — click Yes. Close Registry Editor and restart your PC. After the restart, Windows Update no longer has the instruction to install New Outlook.

One-Liner Alternative (Command Prompt)

If you prefer to skip the manual registry navigation, open Command Prompt as Administrator and run this single command to delete the key immediately:

reg delete "HKLM\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe\OutlookUpdate" /f

Windows 10 Note: On Windows 10, deleting the key may not be enough. Instead, select the OutlookUpdate key (don’t delete it), right-click the empty right panel, and create a new String Value named BlockedOobeUpdaters. Set its value data to ["MS_Outlook"]. This explicitly tells Windows Update to skip the Outlook installer. The registry path is the same.

You can also use the reg add command to set the Windows 10 block in one step:

reg add "HKLM\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe\OutlookUpdate" /v BlockedOobeUpdaters /t REG_SZ /d "[\"MS_Outlook\"]" /f

Method 2: Remove New Outlook If Already Installed

If New Outlook is already on your PC, the registry fix above won’t remove it — it only blocks future installations. Here’s how to fully remove it and prevent it from coming back.

Step 1: Uninstall from Settings

Go to Settings > Apps > Installed apps, search for Outlook (new), click the three-dot menu next to it, and select Uninstall. Confirm when prompted.

Step 2: Delete the Registry Key to Block Reinstallation

After uninstalling, delete the OutlookUpdate registry key as described in Method 1 above. If you skip this step, Windows Update will reinstall New Outlook the next time it runs. The reg delete one-liner below handles both removal confirmation and key cleanup in sequence:

reg delete "HKLM\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe\OutlookUpdate" /f

Run this in an elevated Command Prompt after uninstalling from Settings. The key may not exist if Windows Update hasn’t queued the next installation yet — that’s fine, the command will report a not-found error which you can ignore.

Tip: If you’re dealing with multiple unwanted apps — Dev Home, New Outlook, Cortana, and others — the Windows 11 bloatware removal guide covers how to remove them all cleanly. You can also use Winhance to manage all of this in one interface.

Common Issues & Solutions

The OutlookUpdate key doesn’t exist. This key only appears when Windows has queued New Outlook for installation but hasn’t installed it yet. If it’s absent, New Outlook may already be installed — uninstall it from Settings and then check back after the next Windows update cycle to see if the key reappears.

New Outlook came back after a Windows update. Microsoft can recreate the OutlookUpdate key through update packages. If it returns, just repeat the deletion. It’s an ongoing issue with how Microsoft pushes these apps — the fix itself is quick each time.

Registry Editor shows “Access Denied.” You need administrator rights. Right-click the Start button, open Terminal (Admin), type regedit, and press Enter to launch Registry Editor with the right permissions.

Frequently Asked Questions

Does this method work on Windows 10?

The registry path is the same on Windows 10, but the fix works slightly differently. On Windows 10, you should not delete the OutlookUpdate key — instead, create a new String value inside it called BlockedOobeUpdaters and set its data to ["MS_Outlook"]. This explicitly flags the Outlook installer as blocked. See the Windows 10 note in Method 1 above for the reg add one-liner.

Will this affect my existing Outlook or Microsoft 365 installation?

No. This only blocks the new standalone Outlook app that Microsoft pushes through Windows Update. Classic Outlook installed via Microsoft 365 or Office is completely separate and will not be affected by this registry change.

Can I undo this change later?

Yes. If you want New Outlook back, you can reinstall it from the Microsoft Store, or simply let Windows Update run — Microsoft will recreate the OutlookUpdate key through future update packages, and New Outlook will install again. To restore the Windows 10 block, just delete the BlockedOobeUpdaters value you created.

Is it safe to delete registry keys like this?

Yes, as long as you only delete exactly what’s described. Before making any registry changes, it’s a good habit to export a backup first — in Registry Editor, go to File > Export to save a copy. The specific key being deleted here is a Windows Update installer instruction, not a system-critical key.

Can I block other unwanted apps from being pushed by Windows Update?

Yes — the Windows Update Orchestrator uses the same UScheduler_Oobe folder for other apps too. I used the same approach to block Dev Home from installing automatically. For a more comprehensive solution that manages multiple apps and Windows settings at once, Winhance handles all of this through a clean interface without manual registry work.

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