Having a backup copy of your BitLocker recovery key helps to prevent serious issues later. It takes less than a minute to back up your key and this article will show you how.

Windows 10, version 21H2 update history; July 9, 2024—KB5040427 (OS Builds 19044.4651 and 19045.4651) June 11, 2024—KB5039211 (OS Builds 19044.4529 and 19045.4529)

Digital goods like apps, games, add-on content, subscriptions, movies, TV shows, and books aren't returnable unless the offer for applicable law states that you're eligible for a refund.

Turn on Find my device. When you set up a new device, you can decide whether to turn on or turn off the Find my device setting. If you turned it off during setup and now want to turn it on, make sure your Windows device is connected to the internet, has enough battery power so it can send its location, and that you're signed in to the device using your Microsoft account.

Notes: If you don't see Go to Microsoft Store on the Activation page, contact your organization's support person.. If you made a substantial hardware changes to your device (such as replacing the motherboard) and you have a valid product key, try to activate Windows by phone.

Windows 11 のライセンス認証を行う場合は、「 Windows のライセンス認証を行う」を参照してください。

Training: Get up and running quick. Note: If you already had an account signed in to OneDrive and you want to add another account, click the OneDrive cloud icon up in the Menu bar, click the three dots to open the menu, and select Preferences.Click the Account tab, select Add an Account to start OneDrive Setup, and then sign in.

Look up a forgotten username using other information. Look up your username using your security contact phone number or email address. Search

Add a contact from someone's profile card. If you're using Outlook in an organization and you click someone's name or picture in Outlook or other Office apps and services, you might see a profile card with additional information.

Your Outlook mailbox is only so big, and it’s a good bet that you won’t stop getting email anytime soon. To keep it from filling up, you can move old items you want to keep to an archive, a separate Outlook Data File (.pst) that you can open from Outlook any time you need it.