Learn how to find your Windows product key for activation or when to use a digital license instead.

Download our Formulas tutorial workbook. We've put together a Get started with Formulas workbook that you can download. If you’re new to Excel, or even if you have some experience with it, you can walk through Excel’s most common formulas in this tour.

Use System restore to make restore points when you install a new app, driver, or Windows update, and when you create a restore point manually.

A new tab to Sign in using your Yahoo account will open in your web browser. Follow the prompts to complete signing in, including any two-factor authentication prompts you set up for this account.

回復ドライブを使用して PC にWindows 11を再インストールする必要がある場合は、Windows の回復オプションに関するページを参照してください。 回復ドライブはシステム イメージではないので、Windows PC を頻繁にバックアップすることをお勧めします。 個人用ファイル、設定、プログラムは回復 ...

Vector form. The vector form of LOOKUP looks in a one-row or one-column range (known as a vector) for a value and returns a value from the same position in a second one-row or one-column range.. Syntax. LOOKUP(lookup_value, lookup_vector, [result_vector]) The LOOKUP function vector form syntax has the following arguments:. lookup_value Required.A value that LOOKUP searches for in the first vector.

Windows 11 automatically downloads and installs updates to make sure your device is secure and up to date. This means you receive the latest fixes and security updates, helping your device run efficiently and stay protected.

The Microsoft Mouse and Keyboard Center is an app that helps you make the most out of your Microsoft keyboard and mouse. Mouse and Keyboard Center helps you personalize and customize how you work on your PC.

Learn how to update Windows to ensure your device operates smoothly and securely with the latest features.

Manage your Virus & threat protection settings. Use Virus & threat protection settings when you want to customize your level of protection, send sample files to Microsoft, exclude trusted files and folders from repeated scanning, or temporarily turn off your protection.. Manage your real-time protection. Want to stop running real-time protection for a short while?