Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista.

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

This page is for Microsoft 365 Basic, Microsoft 365 Personal, and Microsoft 365 Family subscriptions only. For help with other subscriptions purchased through Microsoft see Cancel a Microsoft subscription. If you purchased a Microsoft subscription from Google Play or the Apple app store, contact their customer support for cancellation or refund.

Learn how to update Microsoft Office on PC and troubleshooting tips for installing Office updates.

The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs.

Download information. The following files are available for download from the .NET Download site: Download the Microsoft .NET Framework 4.8 offline installer package now.

Defragment your Windows 10 PC. Optimizing your drives can help your PC run smoother and boot up faster.

To adjust power and sleep settings in Windows 10, go to Start , and select Settings > System > Power & sleep.. Under Screen, select how long you want your device to wait before turning the screen off when you're not using your device.

If you're trying to add your Outlook.com account to Outlook or another mail app, you might need the POP, IMAP, or SMTP settings. You can find them below or by viewing them in your Outlook.com settings.. Outlook and Outlook.com may be able to detect your account's mailbox settings automatically, but for other non-Microsoft accounts, you may need to contact your email provider for their settings.

Learn how to reinstall Windows on your PC and how activation works after it's installed.