Install Microsoft 365 2019 or 2016 on a PC. Remember a one-time purchase version of Microsoft 365 is licensed for one install only. Depending on your browser, select Open file (in Edge or Internet Explorer), Setup (in Chrome), or Save File (in Firefox).

The Microsoft Defender Offline scan will automatically detect and remove or quarantine malware. Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

Use Microsoft Teams (work or school) for a Microsoft work or school account or a guest account in Windows 11. Also, find out which version of Teams you’re using.

If you are having issues installing or updating Gaming Services on your PC, or if you are noticing that the Xbox app for PC is launching with missing content, you may want to download and run the Gaming Services Repair Tool for PC.

The Microsoft Support and Recovery Assistant works by running tests to figure out what's wrong and offers the best solution for the identified problem. It can currently fix Office, Microsoft 365, or Outlook problems.

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

See plans and pricing. Get help with your questions about Microsoft Teams from our how-to articles, tutorials, and support content.

If you already redeemed a product key, you're simply reinstalling the apps, or you know you have an assigned license through work or school, you can skip ahead and go to the section sign in to download and install Microsoft 365 or Office.

Find Teams on the web at https://teams.microsoft.com. To use Teams, you need a Microsoft 365 account with a Business or Enterprise Microsoft 365 license plan.

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