Use the DATEDIF function when you want to calculate the difference between two dates. First put a start date in a cell, and an end date in another. Then type a formula like one of the following. Warning: If the Start_date is greater than the End_date, the result will be #NUM!.

Windows 语音识别允许你单独通过语音控制电脑，而无需键盘或鼠标。. 本文列出了可用于语音识别的命令。. 有关如何首次设置语音识别的说明，请参阅 在 Windows 中使用语音识别 。. 注意: 每当需要找出要使用的命令时，说“我能说什么？. 语音识别仅适用于以下 ...

To check for updates, select Start > Settings > Windows Update , then select Check for updates. If updates are available, you can choose to install them. Check for updates. If you run into problems updating your device, including problems with previous major updates, see common fixes at Troubleshoot problems updating Windows.

Microsoft .NET Framework 4.8.1 is a highly compatible and in-place update to .NET Framework 4.8. It includes native support for the Arm64 architecture (Windows 11+), accessibility improvements as well as other improvements.

Generally, if you bought a physical copy of Windows, the product key should be on a label or card inside the box that Windows came in. If Windows came preinstalled on your PC, the product key should appear on a sticker on your device. If you’ve lost or can’t find the product key, contact the manufacturer. To ensure your product key is ...

Get a theme. To get a theme, expand one of the categories below, select a link for the theme, and then select Open. This saves the theme to your PC and puts it on your desktop. If you prefer, some themes can also be installed from the Microsoft Store. Explore themes in the Microsoft Store. Get free Windows themes from Microsoft to personalize ...

For the best experience, download and install the new version of the Quick Assist app from Microsoft Store. If you have problems installing Quick Assist, here are some steps to try to get it installed and working properly.

Windows 11 Windows 10. To adjust power and sleep settings in Windows 11, select Start > Settings > System > Power & battery > Screen and sleep. Screen: Select how long you want your device to wait before turning the screen off when you're not using your device. Sleep: Select how long you want your device to wait before going to sleep when you ...

Windows 10. Depending on your hardware, you may use the Windows Logo Key + PrtScn button as a shortcut for print screen. If your device does not have the PrtScn button, you may use Fn + Windows logo key + Space Bar to take a screenshot, which can then be printed. To locate your screenshots, open File Explorer from the taskbar. On the side ...

Add a new Yahoo email account. On the View tab, select View settings. Select Accounts, then Email accounts. Tip: If your Settings window doesn't look like this, you might be using classic Outlook. Select + Add Account. Enter the Yahoo! account you want to add and select Continue. On Sync your Yahoo account, select Continue.