Safe mode starts Windows in a basic state, using a limited set of files and drivers. If a problem doesn't happen in safe mode, this means that default settings and basic device drivers aren't causing the issue.

Microsoft Defender is a security app that helps people and families stay safer online with malware protection, web protection, real-time security notifications, and security tips.Microsoft Defender is included in a Microsoft 365 Family or Personal subscription and works on your phone (Android or iOS), PC, and Mac.

If you’re having sound or audio problems, the following suggestions might help. The tips are listed in order, so start with the first one, see if that helps, and then continue to the next one if it doesn’t.

For keyboard shortcuts in which you press one key immediately followed by another key, the keys to press are separated by a comma (,). For example, for è you would press Ctrl + `, release and then type e.

Show the Developer tab. If the developer tab isn't displayed in the ribbon, see Show the Developer tab.. Open a template or use a blank document. To create a form in Word that others can fill out, start with a template or document and add content controls.

If a language is listed under Preferred languages but doesn't appear on the Windows display language list, you'll first need to install its language pack (if it's available).. Select Start > Settings > Time & language > Language & region.

Note: To upgrade to Windows 11, devices should meet the Windows 11 minimum system requirements.Some Windows 10 features aren't available in Windows 11. System requirements to experience some Windows 11 features and apps will exceed the Windows 11 minimum system requirements.Find Windows 11 specs, features, and computer requirements

注意: 如果希望 INDEX 或 MATCH 函数返回有意义的值而不是 #N/A，请使用 IFERROR 函数，然后将 INDEX 和 MATCH 函数嵌套在该函数中。 将 #N/A 替换为自己的值只会识别错误，但无法解决错误。 因此，在使用 IFERROR 之前，请务必确保公式按原样正常工作。

Learn how to find your Windows product key for activation or when to use a digital license instead.

In quick settings: To find the quick setting for Bluetooth, select the Network, Sound, or Battery icons ( ) next to the time and date on the right side of your taskbar.Select Bluetooth to turn it on. If it's turned on without any Bluetooth devices connected, it might appear as Not connected . If you don't see Bluetooth in quick settings, you might need to add it.