Learn how to set up a proxy server on your Windows 11 or Windows 10 PC for browsing the web. Find out the requirements, options and steps for automatic, script or manual proxy server connection.

Learn how to uninstall or remove apps and programs in Windows 10 or 11 using different methods. Find tips and troubleshooters for common issues and errors.

Learn how to use the MSRT to remove specific prevalent malware from Windows computers. Find out how to download, run, and update the tool, and what it does when it detects malicious software.

Learn how to use Microsoft Defender Antivirus to scan and remove malware from your PC. Follow the steps to run an offline scan, view the results, and take action on the detected threats.

Learn how to use the Windows Security Troubleshooter to diagnose and repair Windows security problems by turning on UAC, DEP, Windows Firewall, and other features. Download the troubleshooter and run it on the affected computer or a flash drive or a CD.

Learn how to use the Program Install and Uninstall troubleshooter to fix corrupted registry keys, prevent programs from being installed or removed, and access the product code. The troubleshooter runs on Windows 10, 8.1, 8, and 7.

Download and run a tool to automatically diagnose and fix common problems with Windows Firewall, such as service errors, remote assistance issues, or sharing blocks. The troubleshooter works for Windows 7, 8, and 10 in any language.

Learn how to configure and use Windows Security to block potentially unwanted applications (PUA) that can slow down or harm your PC. Find out how Windows Security detects and notifies you of PUA, and how to take action on them.

Learn how to manage extensions in Microsoft Edge, including adding, disabling, or removing them as needed.

Learn how to start a quick or a deep scan for malware on Windows, Android, or Mac devices with Microsoft Defender. Find out the signs of infection and how to protect your PC with offline scan.