Download and install or reinstall Microsoft 365 or Office 2021 on a PC ...
Change from a 32-bit version to a 64-bit version or vice versa. Activate Windows. Fix Bluetooth problems in Windows. Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.
Applies To:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Admin, Microsoft 365 for Mac, Office 365 Germany - Enterprise, Office 365 Germany - Enterprise admin
Get help with Windows activation errors - Microsoft Support
Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow. This article will help you troubleshoot and fix common activation errors in Windows. For help finding your product key, see Find your Windows product key.
Fix Bluetooth problems in Windows - Microsoft Support
Fix Bluetooth problems in Windows. If you run into problems trying to connect to a Bluetooth device, here are some troubleshooting steps to try. Note: For general info about how to connect a Bluetooth device to your PC, see Pair a Bluetooth device in Windows.
Recovery options in Windows - Microsoft Support
Learn about the recovery options in Windows. Find out how to reset your PC, go back to a previous version of Windows, or use media to reinstall Windows.
What's the difference between Microsoft 365 and Office 2021?
Microsoft 365 is a subscription service that makes sure you always have the most up-to-date modern productivity tools from Microsoft. There are Microsoft 365 plans for home and personal use, as well as for small and midsized businesses, large enterprises, schools, and non-profits. Microsoft 365 plans for home or business include the robust ...
Applies To:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 for home, Office for business, Microsoft 365 admin
Find your Windows product key - Microsoft Support
A Windows product key is a 25-character code used to activate Windows. It looks like this: PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. Locate your product key for Windows 10 or Windows 11.
Applies To:
Microsoft account dashboard
Fix USB-C problems in Windows - Microsoft Support
Possible causes. Make sure your PC, the external display, and the cable all support DisplayPort or MHL alternate modes. Make sure the device or dongle is connected directly to your PC. Make sure the device or dongle is connected to the USB-C port on your PC that supports the correct Alternate Mode.
Pin apps and folders to the desktop or taskbar - Microsoft Support
In Windows 11, apps don't automatically get added to your desktop. Learn how to pin apps to your desktop or taskbar in Windows 11 or Windows 10.
Language packs for Windows - Microsoft Support
The easiest way to get language packs for Windows 8.1 and Windows RT is to download and install them using the Language Control Panel. Download and install additional languages to view menus, dialog boxes, and other user interface items in your preferred language.
Change your app recommendation settings in Windows
To help protect your PC and keep it running smoothly, Microsoft recommends only installing apps from the Microsoft Store. You can choose where you can get apps from and if you want to see app recommendations when you try to install an app from outside of the Microsoft Store.