Find out how to change the color of the Start menu, taskbar, and action center with dark and custom mode personalization settings.

Learn about the UNIQUE function, which returns a list of unique values in a list or range. UNIQUE is in a class of functions called dynamic arrays.

If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. To restore all features of Office, you'll need to fix the problem that's causing activation to fail.

Note: If you receive a prompt asking whether to allow the app to access your camera (iOS) or to allow the app to take pictures and record video (Android). select Allow so the authenticator app can access your camera to take a picture of the QR code in the next step.If you don't allow the camera, you can still set up the authenticator app as described in Manually add an account to the app.

How to open all of your Favorites Bar shortcuts in the Microsoft Edge web browser.

Find out how to change privacy settings for your camera and microphone in Windows.

Learn how to redeem a Microsoft/Xbox gift card or other code on your mobile device, Windows device, or Xbox console.

How to use the COUNT function in Excel to count the number of cells that contain numbers, and to count numbers within a list of arguments.

After an email message is sent in Outlook 2013 or Outlook 2016, you can check it later to read it again or resend it.

Microsoft Edge で、閲覧履歴やその他の履歴を表示したり削除したりする方法について説明します。