Signing certificate To create a digital signature, you need a signing certificate, which proves identity. When you send a digitally-signed macro or document, you also send your certificate and public key. Certificates are issued by a certification authority, and like a driver’s license, can be revoked. A certificate is usually valid for a ...

可通过不同的方式删除应用和程序，因此如果找不到要查找的应用和程序，可以尝试另一个位置。 请注意，某些应用和程序内置于 Windows 中，无法卸载。 如果程序无法正常运行，则可以先尝试 修复 它。

使用 VLOOKUP 存在一些限制，即 VLOOKUP 函数只能从左到右查找值。 这意味着包含查找值的列应始终位于包含返回值列的左侧。 现在，如果电子表格不是以这种方式生成，则不要使用 VLOOKUP。 可以使用 INDEX 和 MATCH 组合函数代替。

Windows Photo Viewer isn't part of Windows 10, but if you upgraded from Windows 7 or Windows 8.1, you might still have it. To check, press and hold (or right-click) a photo in File Explorer, and select Open with. If Windows Photo Viewer isn't in the list, you cannot install it on Windows 10.

Learn how to navigate Windows using keyboard shortcuts. Explore a full list of taskbar, command prompt, and general Windows shortcuts.

虚拟化可让你的电脑模拟不同的操作系统，例如 Android™ 或 Linux。 通过启用虚拟化，你可以访问更大的应用库，以便在电脑上使用和安装。 如果你在电脑上从Windows 10升级到Windows 11，这些步骤将帮助你启用虚拟化。 了解如何通过电脑的 UEFI (或 BIOS) 启用虚拟化，以运行适用于 Android 的 Windows 子系统 ...

Activate Office 2010 online. Click File > Help > Activate Product Key. If you don't see an Activate Product Key button, your software is already activated, and you don't need to do anything. Follow the steps in the Activation Wizard. If you're activating over the Internet and have a slow connection, you might want to activate by phone.

若要登入 Hotmail，您將需要您的 Microsoft 帳戶使用者名稱和密碼。. 登入時，如果您下次想要直接移至信箱，請在 [保持登入?] 提示中選取 [是] (不建議用於共用電腦)。. 或者，選取 [不要再顯示這個] 方塊，然後選取 [否] ，這樣每次都會提示您輸入密碼。. 如果您 ...

Whether you like to apply changes that affect your photo's quality, feel, and look—or you want to add information on top of your photos, the Microsoft Photos app in Windows gives you all kinds of options for getting your photos and videos looking their best.

See how to find things you've downloaded on your PC.