Use the System File Checker tool to repair missing or corrupted system files. When critical Windows system files are missing or corrupted, some Windows features may stop working correctly or Windows may stop responding altogether.

Use this tool to find and remove specific prevalent threats and reverse the changes that they made (see Covered malware families). For comprehensive malware detection and removal, consider using Windows Defender Offline or Microsoft Safety Scanner.

Real-time protection is a feature in the Windows Security app that continuously monitors your device for potential threats such as viruses, malware, and spyware. This feature ensures that your device is actively protected by scanning files and programs as they are accessed or executed.

Many Internet Web sites contain JavaScript, a scripting programming language that runs on the web browser to make specific features on the web page functional. If JavaScript has been disabled within your browser, the content or the functionality of the web page can be limited or unavailable.

Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by: We encourage you to install Microsoft Defender on at least five devices per person. Ready to give it a try?

Windows 11 will then restart automatically. This is also known as a stop code error, a bug check, a kernel error, or a Blue Screen error, or a Black Screen error, or BSOD.

Once you've captured a snip, select the Text actions button to activate the Optical Character Recognition (OCR) feature. This allows you to extract text directly from your image.

Press Windows logo key+Shift+S. The desktop darkens so you can select an area for your screenshot. If you select rectangular or free-form mode, you must then click and drag to highlight the area you want to capture. If you select window or full-screen mode, the capture takes place immediately.

Describe your problem, and we'll provide self-help or connect you to the most appropriate support, which may include chat or request a call — we’ll call you, so you don’t have to wait. Get help. Please note that support cases for Surface business devices may only be initiated online.

Learn how to configure screen saver settings in Windows.