Hello,
Thank you for reaching out to us today I understand how confusing it can be to suddenly see duplicates of your programs on your device and I know it can be frustrating when apps like Outlook, Messenger, Address Book or Facebook appear twice and start cluttering your Start menu or desktop. This often happens after a system update, an upgrade from older app versions to newer Microsoft Store versions or when shortcuts are recreated during the update process. In many cases one icon is for the classic desktop application while the other is for the newer Store version.
You can open each version to see which one you prefer to use then remove the extra one either by uninstalling it from Settings under Apps and Installed apps or by deleting the duplicate shortcut if that option appears when you right‑click it.
Do the duplicates appear only in your Start menu or do they also show up in your installed apps list?
I hope this answer is helpful if you have further questions feel free to reply back
Regards,
Marcelo