Solve problems with detecting and removing malware with Windows Security, including incomplete scans, detection errors, and persistent malware.

Tamper Protection in Windows Security helps prevent malicious apps from changing important Microsoft Defender Antivirus settings, including real-time protection and cloud-delivered protection. If Tamper Protection is turned on and you're an administrator on your computer, you can still change these settings in the Windows Security app.

Your PC isn't working well and you recently installed an app. Restore from a system restore point. You suspect your device has been infected. Use installation media to reinstall Windows 11. Click one of the recovery options below and follow the steps to try to get things working again.

Antivirus software. If you’re running third-party antivirus software on your PC, sometimes that can incorrectly cause installation errors. If you encounter issues installing games, try suspending your antivirus software temporarily while you attempt to troubleshoot game installation from the Xbox app or the Microsoft Store app on your PC.

Get Skype Download, install, and upgrade support for your Skype Lite and stay connected with friends and family from wherever you are.

This service is free. Microsoft Store support. Get help and support, whether you're shopping now or need help with a past purchase. Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

When you start your computer successfully, the Windows Registry Checker tool (Scanreg.exe) creates a backup of system files and registry configuration information (including user account information, protocol bindings, software program settings, and user preferences) once daily.

This security update resolves a Microsoft Excel remote code execution vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2023-23399. Note: To apply this security update, you must have the release version of Microsoft Office 2016 installed on the computer.

Get Skype Download, install, and upgrade support for your The new Skype for Windows, Mac and Linux and stay connected with friends and family from wherever you are.

The utility restores backups that are made on Windows XP and on Windows Server 2003 to computers that are running Windows 7 and Windows Server 2008 R2. To download the utility, go to the "How to obtain this update" section. Removable Storage Manager (RSM) is no longer included in Windows 7 or in Windows Server 2008 R2.