How to use the COUNTIF function in Excel to count the number of cells that meet values you set.

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。

You can choose which apps will start automatically when you start your device.

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.

Find your Wi-Fi network password in Windows, so you can connect to your Wi-Fi network on other devices.

Learn how to get Outlook set up to work with Microsoft 365, POP, IMAP, or Microsoft Exchange-based email accounts.

Learn how to change or reset your Windows password if you've forgotten or lost it.

Learn how to run a disk cleanup in Windows including deleting temporary and system files to free up disk space.

The Microsoft Authenticator app helps you sign into your accounts when you're using two-step verification.

Export Outlook email, contacts, and calendar to move them to another computer or so that you can make a backup of your information.