In Device Manager, select Display adapters, then select the display adapter. Press and hold (or right-click) the display adapter name, then select Update driver and follow the instructions. Get steps for how to change screen brightness in Windows.

Download and install or reinstall Microsoft 365 or Office 2021 on a PC or Mac. Set up Office apps and email on a mobile device. Small business help and learning. Learn how to download and install apps you need from your Microsoft 365 business subscription.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

If you have an home product and bought Microsoft 365 or Office at a retail store or online store, but don't have a Microsoft account, it's possible you haven't redeemed your product key yet (if you got one), or you missed the step for linking your recent purchase with an account. Do the following to link an account with Microsoft 365 or Office.

See more email options. Right-click folders in the Folder Pane to see common organization actions. Right-click an email in the Message List to show more message options. Right-click the Reading Pane for additional email commands such as translation.

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.

Add, remove or update an email address or phone number. If you want to make changes to the email addresses or phone numbers associated with your Microsoft account, use our guided support tool below to help you update the right information in the right way.

If you are trying to set up an Exchange account in Outlook, ask the organization that gave you the email address for the name of your Exchange server. It's standard for them to provide you with this information so you can add your email address to a computer or phone.

Use the Office offline installer to install Office 2016 or Office 2013 if you don't have an active Internet connection or you're having problems with slow speed or unreliable connections.

The VLOOKUP and HLOOKUP functions, together with INDEX and MATCH,  are some of the most useful functions in Excel. Note: The Lookup Wizard feature is no longer available in Excel. Here's an example of how to use VLOOKUP. =VLOOKUP (B2,C2:E7,3,TRUE) In this example, B2 is the first argument —an element of data that the function needs to work.