Learn how to troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.

Summary. Microsoft Update Health Tools is offered to devices through Windows Update as update KB4023057. This update is applicable for both Windows consumer and commercial devices, with a slightly different purpose and functionality.

Discusses the release of the Malicious Software Removal Tool (MSRT) to help remove specific prevalent malicious software from Windows-based computers.

了解如何从 Windows 10 家庭版升级到 Windows 10 专业版或从 Windows 11 家庭版升级到 Windows 11 专业版，包括如何使用有效产品密钥或 Microsoft Store。

Learn how to activate Windows using an internet connection, automated system, or live support advocate.

When you back up your files, apps, and settings in the cloud using your Microsoft account, you get 5 GB of free cloud storage and other benefits that protect your files with the latest security and make everyday tasks easier.

Learn about what effect closing a Microsoft account might have on your other apps and services.

Hotmail è ora Outlook.com. Scopri come accedere a Outlook.com per usare l'account di posta elettronica Outlook, Hotmail, Live o MSN.

See your options to upgrade your version of office with or without a subscription.

With Microsoft Edge, you can turn on sync to browse the web on all your devices, keep your favorites organized, and more.