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. To ensure your product key is ...

Help with BitLocker. Finding product keys for Windows and Office. Other support. Help with a work or school account password. I need to talk to a customer support agent. Learn how to get Microsoft account help, troubleshoot sign in issues, keep your account secure, and manage your Microsoft account dashboard.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

在線上更新您的資訊. 若要更新您的帳單地址：. 登入您想要更新的 Microsoft 帳戶。. 登入. 移至 [付款與帳單] 然後選取 [通訊錄]。. 您可以在這裡新增或編輯帳單和寄件地址。. 注意 若要變更您的預設帳單地址，您可能需要新增地址，然後將它設為您的新預設地址 ...

From the next screen, select Troubleshoot > Advanced options > UEFI Firmware Settings > Restart to make changes. To change these settings, you will need to switch the PC boot mode from one enabled as “Legacy” BIOS (also known as “CSM” Mode) to UEFI/BIOS (Unified Extensible Firmware Interface). In some cases, there are options to enable ...

Multiply numbers in different cells by using a formula. You can use the PRODUCT function to multiply numbers, cells, and ranges.. You can use any combination of up to 255 numbers or cell references in the PRODUCT function. For example, the formula =PRODUCT(A2,A4:A15,12,E3:E5,150,G4,H4:J6) multiplies two single cells (A2 and G4), two numbers (12 and 150), and three ranges (A4:A15, E3:E5, and H4 ...

如果使用你的 Microsoft 帐户余额购买游戏或加载项，则帐户中的资金可能不足以支付商品的总价格。. 例如，如果尝试购买的游戏的单价为 9.99 美元，而 Microsoft 帐户余额为 10 美元，则该金额不足以支付税款，因此需要充值才能支付总余额。. 如果收到数字充值码 ...

Protect yourself from phishing. Phishing (pronounced: fishing) is an attack that attempts to steal your money, or your identity, by getting you to reveal personal information -- such as credit card numbers, bank information, or passwords -- on websites that pretend to be legitimate. Cybercriminals typically pretend to be reputable companies ...

Sign in to Microsoft 365 admin center with your Microsoft 365 admin account, and select Support > Help and support, enter your question and select Contact support. If you're an admin on the account you can also call (800) 865-9408 (toll-free, US only). If you’re outside the United States, see the global support phone numbers. Business Assist ...

如何实现在电脑 Xbox 应用上向朋友发送试用优惠？. 符合条件的成员可以邀请来自电脑 Xbox 应用的好友。. 转到设置 > 帐户，然后选择邀请好友。. 在这里，你可以创建和管理引荐链接以发送给好友。.