PC Health Check app brings you up to date info on your Windows device health, helping you take action to improve your device performance and troubleshoot performance problems. It is periodically updated based on customer feedback to help you make the most of your Windows PC. How to open PC Health Check. In Windows, use Search on the taskbar to ...

From your files, themes, and some settings to many of your installed apps and Wi-Fi information - Windows Backup will help protect what matters and make it easier than ever to move to a brand-new PC. This guide will help you to use Windows Backup to back up key things on your Windows PC.

在 Excel 中，IF 函数允许通过测试某个条件并返回结果（如果该条件为 True 或 False），在值和预期值之间进行逻辑比较。. =IF（内容为 True，则执行某些操作，否则就执行其他操作）. 但如果需要测试多个条件，例如我们假设所有条件都需要为 True 或 False (AND)，或 ...

本文介绍如何在 Windows 8.1、Windows 8、Windows 7 或 Windows Vista 中使用系统文件检查器工具来解决丢失或损坏的系统文件的问题。.

下面是如何使用 VLOOKUP 的示例。. =VLOOKUP (B2,C2:E7,3,TRUE) 在此示例中，B2 是第一个 参数，即函数运行所需的数据元素。. VLOOKUP 第一个参数是要查找的值。. 此参数可以是单元格引用，也可以是固定值，例如“smith”或 21,000。. 第二个参数是单元格搜索范围 C2-:E7 ...

附註: 您的 Hotmail 或 Outlook.com 密碼與您的 Microsoft 帳戶密碼相同。. 如果您可以登入但遇到 Outlook.com 的問題，請檢查 服務狀態。. 如果狀態不是顯示綠色，請等候該服務正常執行，然後再試一次。. Microsoft 會始終關注不常見的登入活動，以防其他人嘗試進入您的 ...

Post questions, follow discussions and share your knowledge in the Outlook.com Community. Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

Ways to install Windows 11. Installing Windows 11 on devices that don't meet minimum system requirements. If you changed your hardware in order to upgrade to Windows 11 and the system is not recognizing the change in a timely manner, this article explains how to initiate the assessment manually.

Manage your Microsoft 365 subscription or Office product. You can manage all of your Microsoft subscriptions in your Microsoft account dashboard. Select each subscription to change when and how you pay, or to see order history & receipts. Choose your account type.

Depending on your product and if it's still in support, Microsoft support experts are available to help you with a broad selection of support options and able to address product and service challenges for a more personalized experience.