Learn how to create installation media for installing or reinstalling Windows 7, Windows 8.1, or Windows 10.

Summary. Microsoft Office Excel support Automation Add-ins in addition to Component Object Model (COM) Add-ins. This article explains the differences between these two types of Add-ins.

Learn how to sign in to your Hotmail account, now known as Outlook.com, and access your emails.

Learn how to use the PC Health Check app to help you improve your device performance.

Learn how to install Office 2013 on your PC or Office for Mac 2011.

Find out how to fix sound or audio problems in Windows.

Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Try these solutions 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.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.