If you can't sign in to your Outlook.com, Hotmail, Live, or MSN email account, or you're not sure how to sign in or sign out, here are some solutions.

How to earn Microsoft Rewards points. It’s easy to rack up Microsoft Rewards points and earn your way toward great rewards like gift cards, movies, games, nonprofit donations, and more. Stay signed in with your Microsoft account and you'll earn points for doing the things you already do.

Select the Network icon on the right side of the taskbar, and then move the Brightness slider to adjust the brightness. (If the slider isn't there, see the Notes section below.) Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions.

Select the Help tab to contact customer support or see training videos. Use Search to find other commands or search through your email, contacts, and calendar.

Here are some best practices for earning Microsoft Rewards points so you can redeem them for gift cards, games, sweepstakes, nonprofit donations, and more.

View messages grouped by conversation in new Outlook. At the top of the page, select Settings > Mail > Layout. Under Message organization, choose either of the options depending on whether you want to show email grouped by conversation or as individual message.

If you're having trouble installing updates, see Troubleshoot problems updating Windows. For answers to frequently asked questions, see Windows Update: FAQ. Learn about Windows service packs and download the latest updates for Windows 10 and Windows 8.1.

If you have a worksheet with data in columns that you need to rotate to rearrange it in rows, use the Transpose feature. With it, you can quickly switch data from columns to rows, or vice versa.

A plus sign (+) in a shortcut means that you need to press multiple keys at the same time. A comma sign (,) in a shortcut means that you need to press multiple keys in order. This article describes the keyboard shortcuts in new Outlook for Windows.

Select the cell you want to combine first. Use commas to separate the cells you are combining and use quotation marks to add spaces, commas, or other text. Close the formula with a parenthesis and press Enter. An example formula might be =CONCAT (A2, " Family").