Create a system restore point. Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

How to lock cells in Excel to protect your data. You can also unlock a range of cells and grant permissions to others to edit.

vlookup、hlookup、その他の index や match などの関数を使い、ユーザーが入力した値に基づいてデータを検索して見つけます。 この記事では、vlookup について簡単に復習してから、その他の情報へのリンクを示します。

This article tells you how to add email accounts to the Mail and Calendar apps so you can start sending and receiving email and creating and managing events.

How to create a checklist in Word that can be filled out by using checkbox controls.

How to use the COUNT function in Excel to count the number of cells that contain numbers, and to count numbers within a list of arguments.

How to combine text or data from two or more cells into one cell in Excel.

Disk Management in Windows helps you perform advanced storage tasks like initializing a new drive and extending or shrinking volumes.

Change your screen saver settings. Select the Start button, then go to Settings > Personalization > Lock screen, and select Screen saver settings.In the Screen Saver Settings window, choose a screen saver from the drop-down list.

You can delete specific files or photos on Microsoft OneDrive, or you can delete entire folders and all the items in them. If you need to, you might be able to restore deleted files from the OneDrive recycle bin.