Fix an App Default Was Reset in Windows 10

If Windows 10 is showing the message “An app default was reset,” it means the operating system has reverted one of your chosen default programs (like your web browser, email client, or music player) back to a Microsoft app such as Edge or Photos. The fix is to set your preferred app as the default again in Settings, and then stop Windows from resetting it again by adjusting a few settings and checking for conflicting apps.

Why Windows 10 Resets App Defaults

Windows 10 resets app defaults for a few reasons, and understanding them helps you prevent the issue from recurring.

Windows updates: Major feature updates (like the October 2020 Update) sometimes reset defaults as part of the upgrade process. This is more common after a big update, but it can also happen with smaller cumulative updates.
New app installations: Some apps, especially those that install browser extensions or helper services, can change their own default status. For example, installing a PDF reader might reset the default for PDF files to that new app, or back to a Microsoft app if the installation fails.
Corrupted file associations: If the registry entries that store your default choices become corrupted, Windows may fall back to its built-in defaults.
User Account Control (UAC) settings: If you have UAC set to “Never notify,” some apps can change defaults without prompting you, and Windows may not register the change correctly.
Third-party cleanup or optimization tools: Some “PC cleaner” or “default manager” tools can inadvertently reset defaults while “fixing” other issues.

How to Check Which Defaults Were Reset

Before you fix anything, it helps to see exactly which defaults Windows reset. The notification itself usually names the app, but you can also check manually.

Open Settings (Windows key + I).
Go to Apps > Default apps.
Scroll through the list. You’ll see categories like Web browser, Email, Music player, Photo viewer, and Video player. Each shows the current default app.
If you see “Microsoft Edge” or “Photos” where you expected another app, that’s the one that was reset.

You can also click on a specific file type (like .pdf or .html) to see which app is associated with it. The notification often appears after a Windows update, so checking after an update is a good habit.

Step-by-Step Fix: Set Your Preferred Defaults Again

Once you know which defaults were reset, here’s how to put them back.

Open Settings > Apps > Default apps.
Click on the app that was reset (for example, “Microsoft Edge” under Web browser). A list of installed apps will appear.
Choose the app you want to use (e.g., Chrome, Firefox, or another browser).
Repeat for any other categories that were reset (Email, Music player, etc.).
If you want to set defaults for a specific file type or protocol, scroll down and click Choose default applications by file type or by protocol.

After you’ve set your defaults, restart your PC to make sure the changes stick. If the notification appears again immediately, move on to the prevention steps below.

How to Stop Windows From Resetting Defaults Again

To prevent future resets, you need to address the underlying causes.

Pause Windows updates temporarily: If a major update is coming, you can pause updates for up to 35 days (in Settings > Update & Security > Windows Update > Advanced options > Pause updates). This gives you time to update your apps and then re-set defaults after the update.
Disable “SmartScreen” for apps and files (optional): Some users report that SmartScreen can interfere with default changes. Go to Settings > Update & Security > Windows Security > App & browser control, and under “Reputation-based protection” you can turn off “SmartScreen for Microsoft Store apps.” This isn’t a guaranteed fix, but it has helped some.
Check for conflicting apps: If you have multiple browsers, email clients, or media players installed, one of them might be “claiming” the default on startup. Look for settings inside each app like “Set as default” or “Make this my default browser.”
Use the classic “Set Default Programs” control panel: Right-click the Start button and choose Control Panel > Default Programs > Set your default programs. Select your preferred app and click “Set this program as default.” This sometimes works when the Settings app doesn’t.
Clean up registry (advanced): If you’re comfortable with the registry editor, you can delete the UserChoice keys under HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts for the affected extensions. This resets the association to “unknown,” and then you can set it again. Back up the registry first, and be careful—this is an advanced step.

Common Problems and Misconceptions

Many users think the reset is a deliberate attempt by Microsoft to force Edge, but it’s usually a side effect of updates or app conflicts. Here are some common issues and clarifications.

“It keeps happening every week.” If defaults reset repeatedly, check for a scheduled task or a startup app that’s changing them. Use Task Manager (Ctrl+Shift+Esc) and go to the “Startup” tab to disable suspicious apps.
“I set Chrome as default, but links still open in Edge.” This often happens because the file association for .html or the HTTP/HTTPS protocol wasn’t changed. Go to Settings > Apps > Default apps > Choose default applications by protocol, and set Chrome for HTTP and HTTPS.
“The notification says ‘An app default was reset’ but I didn’t change anything.” That’s normal—it means Windows did it automatically. The notification is just informing you, not asking for permission.
“Will this break my apps?” No. Resetting a default doesn’t uninstall or damage the app; it just changes which app opens a file type. Your data is safe.

Alternatives to Consider

If the problem persists and you’re tired of re-setting defaults, you have a few options.

Use a third-party default manager: Tools like “Default Programs Editor” or “SetUserFTA” give you more granular control over file associations. They are not official Microsoft tools, so use them at your own risk, but they can be more reliable than the built-in settings.
Switch to a portable app: Portable versions of browsers or media players don’t register themselves as default, so they won’t trigger resets. You’ll have to manually set them as default, and they may not appear in the “Default apps” list.
Live with it: If you only use the default apps occasionally, you can simply click the notification and choose “Switch anyway” when it appears. It’s a two-second fix, but it will keep happening.

Frequently Asked Questions

Why does Windows 10 keep resetting my default browser?

Windows 10 can reset your default browser after a feature update, or when another app (like a PDF reader or a link shortener) changes the HTTP/HTTPS protocol association. It can also happen if the registry entry for your browser’s default is corrupted. Re-setting it in Settings usually works, but if it keeps happening, check for startup apps that might be overriding your choice.

Can I disable the “An app default was reset” notification?

There is no official setting to turn off this specific notification. You can hide it by going to Settings > System > Notifications & actions and turning off notifications for “Windows Update” or “Settings,” but that will also hide other important notifications. The only reliable way to stop it is to prevent the reset itself.

Does a Windows update always reset app defaults?

Not always. Major feature updates (like 21H2) have been known to reset defaults, but monthly cumulative updates usually don’t. The reset is more likely if you’ve never set a default for a particular category, or if the update changes how file associations are stored.

Will resetting app defaults affect my saved passwords or bookmarks?

No. Resetting the default app only changes which program opens a file type or protocol. Your browser’s profile, including passwords and bookmarks, stays intact in its own data folder. You won’t lose any personal data.

What if I don’t want to use a Microsoft app but Windows keeps forcing it?

Make sure you have actually installed the app you want to use (like Chrome or Firefox). Then, go to Settings > Apps > Default apps and click on the current default (e.g., Microsoft Edge) and select your preferred app. If it doesn’t stick, try the Control Panel method mentioned above, or check the app’s own settings to “Set as default.”

Is there a way to back up my default app settings?

You can export the registry keys for file associations. Open Registry Editor (regedit) and navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts. Right-click the “FileExts” folder and choose “Export” to save a .reg file. If defaults are reset, you can double-click that file to restore them. This is an advanced method and should be done with caution.

Final Thoughts

Dealing with reset app defaults in Windows 10 is annoying, but it’s rarely a sign of a serious problem. By re-setting your defaults in Settings, checking for conflicting apps, and being mindful of Windows updates, you can keep your preferred apps in charge. If the issue persists, the registry backup and third-party tools offer more permanent solutions, but always proceed with care.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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