Change your lock screen background. Go to Settings > Personalization > Lock screen.Under Background, select Picture or Slideshow to use your own picture(s) as the background for your lock screen.. Change your lockscreen background

Use the Settings app in Windows 10 to receive files over Bluetooth.

注: 最近 Windows 10 を更新して、ファイルを見つけるのに問題が生じている場合は、「Windows 10 へのアップグレード後に失われたファイルを検索する方法」をご覧ください。

检查你的版本. DirectX 是许多 Windows 游戏都需要的一种多媒体技术套件。 如果你的电脑未安装正确版本的 DirectX（产品包装盒上应标有所需的版本），游戏可能无法正常运行。

This article is for Outlook.com. If you're using Outlook for Windows, see Fixes or workarounds for recent issues in Outlook for Windows.. If you're having problems accessing Outlook.com, you can see the status of Microsoft Office Online Services at the Service Health portal.. If you're having problems sending or receiving email, read how to Fix Outlook.com email sync issues.

If you get an email about unusual activity on your Microsoft account, or if you’re worried that someone else might have used your account, go to the Recent activity page.You’ll see when your Microsoft account was signed in during the last 30 days, along with any device or app-specific info.

How to use the LOOKUP function in Excel to search in a single row or column and find a value from the same position in a second row or column.

Miracast wireless displays. Wirelessly connect your PC to a TV, projector, another PC, or other kind of external display that supports Miracast.

Here are some answers to the frequently asked questions about the OneDrive desktop app for Windows.

You can undo, redo, or repeat many actions in Microsoft Word, PowerPoint, and Excel. You can undo changes, even after you have saved, and then save again, as long as you are within the undo limits (By default Office saves the last 100 undoable actions).