Find your Windows product key - Microsoft Support
Generally, if you bought a physical copy of Windows, the product key should be on a label or card inside the box that Windows came in. If Windows came preinstalled on your PC, the product key should appear on a sticker on your device. If you’ve lost or can’t find the product key, contact the manufacturer.
Applies To:
Microsoft account dashboard
Create a recovery drive - Microsoft Support
It doesn't contain your personal files, settings, or programs. Need more options for creating a recovery drive? For Windows 7, see Create a system repair disc. For Windows 8.1, see Create a USB recovery drive. To download Windows 10 installation media, see Recovery options in Windows.
Use Microsoft Teams for work or school in Windows 11
If you are planning to use Teams free or if you were a guest in an org, you can connect and collaborate by downloading and installing another version of Microsoft Teams (work or school) and signing in with your Microsoft account or the guest account where the invite was sent to.
Applies To:
Microsoft Teams, Microsoft Teams personal, Microsoft Teams small business
Troubleshoot problems updating Windows - Microsoft Support
Important: Before trying any of the solutions below, make sure you back up your personal files. You can back up your Windows PC, or insert a USB drive and use File Explorer to drag and copy important files to the USB drive.If you’re signing into Windows with a Microsoft account, your system settings will be automatically restored after updating, once you’re connected to the internet.
How to sign out of your Microsoft account everywhere
If you think someone might have unauthorized access to your account, we can protect you by signing you out from all of your trusted devices. Within 24 hours, you will be signed out of browsers, apps and anywhere else your account is used to sign in, except an Xbox console.
Applies To:
Microsoft account dashboard
Windows で Bluetooth デバイスをペアリングする - Microsoft サポート
開始する前に、Windows 11 PC が Bluetooth をサポートしていることを確認します。 確認方法の詳細については、「Windows の Bluetooth の問題を解決する」を参照してください。 Bluetooth 機能を備えていないデバイスの追加についてのヘルプは、「Windows PC にデバイスを追加する」を参照してください。
Turn Bluetooth on or off in Windows - Microsoft Support
Here's how to turn Bluetooth on or off in Windows 11: Do one of the following: On the taskbar, select the Network icon. Select the Bluetooth quick setting to turn it On or Off.
Remove malware from your Windows PC - Microsoft Support
Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.
Applies To:
OneDrive (home or personal), OneDrive for Windows
安装 Windows 11 的方法 - Microsoft 支持
重要: 在选择从媒体启动之前，应验证设备是否满足最低系统要求，因为满足后才允许安装 Windows 11，如果你至少具有 TPM 1.2（而不是最低系统要求的 TPM 2.0），它将不会根据处理器的系列和模型验证处理器是否在批准的 CPU 列表上。
Change your default browser in Windows - Microsoft Support
Next to Make Microsoft Edge your default browser, select Set default.