Check the cables (for wired printers). Make sure that the printer's USB cable is properly connected from the printer to your PC. If your USB isn’t recognized, see Automatically diagnose and fix Windows USB problems. Check the wireless connection (for wireless printers).Do one of the following:

Erfahren Sie, wie Sie ein Installationsmedium für die Installation oder Neuinstallation von Windows 7, Windows 8.1 oder Windows 10 erstellen.

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.

To open the dictation toolbar, press the Windows logo key + H.Then say whatever’s on your mind. Using a tablet or touchscreen? Tap the microphone button on the touch keyboard to start dictation. Tap it again to stop, or just say “stop dictation.”

Under Microsoft Defender Firewall, switch the setting to On.If your device is connected to a network, network policy settings might prevent you from completing these steps. For more info, contact your administrator.

Remarque : Le meilleur moyen et le plus sûr d’obtenir les mises à jour des pilotes dans Windows consiste toujours à Windows Update.Si vous rencontrez des problèmes avec Windows Update, vous pouvez voir si l’un des liens de Update Windows peut vous aider en premier.

Notes: If you don't see an option to Cancel, but instead see a link that says Turn on recurring billing, this means your subscription is already set to expire on the date shown and you won't be automatically charged after this date. There's nothing further to do at this time, and you can continue to use the product until your Microsoft 365 subscription expires.

Tip: If you're a Microsoft 365 Family or Personal subscriber you get Microsoft Defender, our advanced security software for Windows, Mac, iOS, and Android, as part of your subscription.Learn more at Getting started with Microsoft Defender.

本文介绍 Microsoft Excel 中 DATEVALUE 函数的公式语法和用法。. 说明. DATEVALUE 函数将存储为文本的日期转换为 Excel 识别为日期的序列号。 例如，公式=DATEVALUE("1/1/2008") 返回 39448，即日期 2008-1-1 的序列号。 即使如此，请注意，计算机的系统日期设置可能会导致 DATEVALUE 函数的结果会与此示例不同。

Syntax. MATCH(lookup_value, lookup_array, [match_type]) The MATCH function syntax has the following arguments: lookup_value Required.The value that you want to match in lookup_array.For example, when you look up someone's number in a telephone book, you are using the person's name as the lookup value, but the telephone number is the value you want.