Explore OneDrive support, help, and learning resources. Learn how to protect your important files, documents, and memories with OneDrive.

Summary. The first hours of a newly installed Windows deployment can leave the system vulnerable because of a Microsoft Defender protection gap.

Symptoms. When the operating system is in high-DPI mode, applications that use the Microsoft Foundation Classes (MFC) library of Microsoft Visual C++ 2013 may behave incorrectly.

Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features.

Is it available on my device? BitLocker encryption is available on supported devices running Windows 10 or 11 Pro, Enterprise, or Education. On supported devices running Windows 10 or newer BitLocker will automatically be turned on the first time you sign into a personal Microsoft account (such as @outlook.com or @hotmail.com) or your work or school account.

A family group is a set of individuals connected through the Microsoft Family Safety app on their Windows, Xbox, or mobile devices. Establishing a family group is an easy, effective way to encourage healthy online habits and manage busy schedules.

Learn how to access Microsoft Store on Windows by selecting the icon on the taskbar or using the search box.

Find out how to use Game Bar to capture game play, chat with friends, track achievements, and more.

If you're unable to open and view the notebook in OneNote for the web, the source of the sync problem is likely with your server. If your notebook is stored on OneDrive, check our Service Status page for any known interruptions or outages. If your notebook is stored on SharePoint, you'll need to contact your administrator to report and troubleshoot the problem.

Important: If your Microsoft cloud storage is full, you cannot send or receive email.Messages sent to you while your storage was full are bounced back to the sender and are unrecoverable. Check your mailbox storage to see what's taking up space. Learn more about recent changes.