From another program that hates windows Ads and Notifications. Don't know what's already addressed in OFGB.

Sync provider notifications in File Explorer

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced" -Name "ShowSyncProviderNotifications" -Value 0

Show recommendations for tips, shortcuts, new apps, and more on Start

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced" -Name "Start_IrisRecommendations" -Value 0

Show me the Windows welcome experience after updates and occasionally when I sign in to highlight what's new and suggested

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager" -Name "SubscribedContent-310093Enabled" -Value 0

Get fun facts, tips, tricks, and more on your lock screen

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager" -Name "RotatingLockScreenOverlayEnabled" -Value 0
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager" -Name "SubscribedContent-338387Enabled" -Value 0
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager" -Name "SubscribedContent-338388Enabled" -Value 0

Get tips and suggestions when using Windows

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager" -Name "SubscribedContent-338389Enabled" -Value 0

Show suggested content in Settings app

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager" -Name "SubscribedContent-338393Enabled" -Value 0
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager" -Name "SubscribedContent-353694Enabled" -Value 0
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager" -Name "SubscribedContent-353696Enabled" -Value 0

Suggest ways to get the most out of Windows and finish setting up this device

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\UserProfileEngagement"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\UserProfileEngagement" -Name "ScoobeSystemSettingEnabled" -Value 0

Let apps show me personalized ads by using my advertising ID

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\AdvertisingInfo"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\AdvertisingInfo" -Name "Enabled" -Value 0

Tailored experiences

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Privacy"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Privacy" -Name "TailoredExperiencesWithDiagnosticDataEnabled" -Value 0

Search box suggestions

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Policies\Microsoft\Windows\Explorer"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Policies\Microsoft\Windows\Explorer" -Name "DisableSearchBoxSuggestions" -Value 1

Windows start menu Bing search

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Search"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Search" -Name "BingSearchEnabled" -Value 0

Windows copilot

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Policies\Microsoft\Windows\WindowsCopilot"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Policies\Microsoft\Windows\WindowsCopilot" -Name "TurnOffWindowsCopilot" -Value 1

Notification suggestions

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Notifications\Settings\Windows.ActionCenter.SmartOptOut"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Notifications\Settings\Windows.ActionCenter.SmartOptOut" -Name "Enabled" -Value 0

Edge hubs sidebar

Note: This key is considered a policy and Edge will say it is managed by an organization.

View more: https://learn.microsoft.com/en-us/deployedge/microsoft-edge-policies

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Policies\Microsoft\Edge"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Policies\Microsoft\Edge" -Name "HubsSidebarEnabled" -Value 0

Edge desktop desarch widget

Create-RegistryKeyIfNotExists "HKCU:\SOFTWARE\Policies\Microsoft\Edge"
Set-ItemProperty -Path "HKCU:\SOFTWARE\Policies\Microsoft\Edge" -Name "WebWidgetAllowed" -Value 0