These are the websites your clean-install Windows PC connects to by itself

OneNote Live Tile. To turn off traffic for this endpoint, either uninstall OneNote or disable the Microsoft Store.

Twitter. To turn off traffic for these endpoints, either uninstall Twitter or disable the Microsoft Store.

Facebook. To turn off traffic for this endpoint, either uninstall Facebook or disable the Microsoft Store.

Photos App. To turn off traffic for this endpoint, either uninstall the Photos app or disable the Microsoft Store.

Candy Crush Saga. To turn off traffic for this endpoint, either uninstall Candy Crush Saga or disable the Microsoft Store.

Microsoft Wallet. To turn off traffic for this endpoint, either uninstall the Wallet app or disable the Microsoft Store.

Groove Music. If you turn off traffic for this endpoint, apps for websites won’t work and customers who visit websites (such as mediaredirect.microsoft.com) that are registered with their associated app (such as Groove Music) will stay at the website and won’t be able to directly launch the app.

Cortana and Search

Microsoft Store Suggestions. If you turn off traffic for this endpoint, you will block images that are used for Microsoft Store suggestions.

Cortana greetings, tips, and Live Tiles. If you turn off traffic for this endpoint, you will block updates to Cortana greetings, tips, and Live Tiles.

Live Tiles. If you turn off traffic for this endpoint, parameters would not be updated and the device would no longer participate in experiments.

Cortana to report diagnostic and diagnostic data information. If you turn off traffic for this endpoint, Microsoft won’t be aware of issues with Cortana and won’t be able to fix them.

Certificates

Automatic Root Certificates Update component. It is possible to turn off traffic to this endpoint, but that is not recommended because when root certificates are updated over time, applications and websites may stop working because they did not receive an updated root certificate the application uses.

Download certificates. We do not recommend blocking this endpoint. If traffic to this endpoint is turned off, Windows no longer automatically downloads certificates known to be fraudulent, which increases the attack vector on the device.

Device authentication

The following endpoint is used to authenticate a device. If you turn off traffic for this endpoint, the device will not be authenticated.

Device metadata

The following endpoint is used to retrieve device metadata. If you turn off traffic for this endpoint, metadata will not be updated for the device.

Diagnostic Data

Connected User Experiences and Telemetry component.  If you turn off traffic for this endpoint, diagnostic and usage information, which helps Microsoft find and fix problems and improve our products and services, will not be sent back to Microsoft.

Windows Error Reporting. To turn off traffic for these endpoints, enable the following Group Policy: Administrative Templates > Windows Components > Windows Error Reporting > Disable Windows Error Reporting.

Font streaming

Download fonts on demand. If you turn off traffic for these endpoints, you will not be able to download fonts on demand.

Licensing

The following endpoint is used for online activation and some app licensing. To turn off traffic for this endpoint, disable the Windows License Manager Service. This will also block online activation and app licensing may not work.

Location

The following endpoint is used for location data. If you turn off traffic for this endpoint, apps cannot use location data.

Maps

The following endpoint is used to check for updates to maps that have been downloaded for offline use. If you turn off traffic for this endpoint, offline maps will not be updated.

Microsoft account

The following endpoints are used for Microsoft accounts to sign in. If you turn off traffic for these endpoints, users cannot sign in with Microsoft accounts.

Microsoft Store

Windows Push Notification Services (WNS). If you turn off traffic for this endpoint, push notifications will no longer work, including MDM device management, mail synchronization, settings synchronization.

Revoke licenses for malicious apps. To turn off traffic for this endpoint, either uninstall the app or disable the Microsoft Store.

Download image files that are called when applications run (Microsoft Store or Inbox MSN Apps). If you turn off traffic for these endpoints, the image files won’t be downloaded, and apps cannot be installed or updated from the Microsoft Store.

Communicate with Microsoft Store. If you turn off traffic for these endpoints, apps cannot be installed or updated from the Microsoft Store.

Network Connection Status Indicator (NCSI)

Network Connection Status Indicator (NCSI) detects Internet connectivity and corporate network connectivity status. NCSI sends a DNS request and HTTP query to this endpoint to determine if the device can communicate with the Internet. If you turn off traffic for this endpoint, NCSI won’t be able to determine if the device is connected to the Internet and the network status tray icon will show a warning.

Office

The following endpoints are used to connect to the Office 365 portal’s shared infrastructure, including Office Online. You can turn this off by removing all Microsoft Office apps and the Mail and Calendar apps.

Connect to the Office 365 portal’s shared infrastructure, including Office Online. You can turn this off by removing all Microsoft Office apps and the Mail and Calendar apps.

Get the metadata of Office apps. To turn off traffic for this endpoint, either uninstall the app or disable the Microsoft Store.

OneDrive

Automatically update URLs. If you turn off traffic for this endpoint, anything that relies on g.live.com to get updated URL information will no longer work.

Download and verify app updates. To turn off traffic for this endpoint, uninstall OneDrive for Business. In this case, your device will not able to get OneDrive for Business app updates.

Settings

Dynamically update their configuration. Apps such as System Initiated User Feedback and the Xbox app use it. If you turn off traffic for this endpoint, an app that uses this endpoint may stop working.

Dynamically update app configuration. Apps such as Windows Connected User Experiences and Telemetry component and Windows Insider Program use it. If you turn off traffic for this endpoint, an app that uses this endpoint may stop working.

Skype

Retrieve Skype configuration values. To turn off traffic for this endpoint, either uninstall the app or disable the Microsoft Store.

Windows Defender

Cloud-based Protection (enabled). If you turn off traffic for this endpoint, the device will not use Cloud-based Protection.

Definition updates. If you turn off traffic for these endpoints, definitions will not be updated.

Windows Spotlight

Retrieve Windows Spotlight metadata that describes content, such as references to image locations, as well as suggested apps, Microsoft account notifications, and Windows tips. If you turn off traffic for these endpoints, Windows Spotlight will still try to deliver new lock screen images and updated content but it will fail; suggested apps, Microsoft account notifications, and Windows tips will not be downloaded.

Windows Update

Windows Update downloads of apps and OS updates. If you turn off traffic for this endpoint, Windows Update downloads will not be managed, as critical metadata that is used to make downloads more resilient is blocked.

Used to download operating system patches and updates. If you turn off traffic for these endpoints, the device will not be able to download updates for the operating system.

Highwinds Content Delivery Network. If you turn off traffic for this endpoint, the device will not perform updates.

Verizon Content Delivery Network. If you turn off traffic for these endpoints, the device will not perform updates.

Download apps and Windows Insider Preview builds from the Microsoft Store. If you turn off traffic for this endpoint, the updating functionality on this device is essentially in a disabled state, resulting in user unable to get apps from the Store, get latest version of Windows, and so on.

Download apps from the Microsoft Store. If you turn off traffic for this endpoint, users of the device will not able to get apps from the Microsoft Store.

Enable connections to Windows Update, Microsoft Update, and the online services of the Store. If you turn off traffic for these endpoints, the device will not be able to connect to Windows Update and Microsoft Update to help keep the device secure.

Content regulation. If you turn off traffic for this endpoint, the Windows Update Agent will be unable to contact the endpoint and fallback behavior will be used.

Used to download content. If you turn off traffic for these endpoints, you will block any content from being downloaded.

Microsoft forward link redirection service (FWLink)

The following endpoint is used by the Microsoft forward link redirection service (FWLink) to redirect permanent web links to their actual, sometimes transitory, URL. FWlinks are similar to URL shorteners, just longer.

If you disable this endpoint, Windows Defender won’t be able to update its malware definitions; links from Windows and other Microsoft products to the Web won’t work; and PowerShell updateable Help won’t update. To disable the traffic, instead disable the traffic that’s getting forwarded.