
Once it scans and finds potential threats, this program will stop them. And it provides real-time protection against various threats such as spyware, malware and viruses on your PC.

Windows Defender (also called Windows Defender Security Center under Windor later), a fully integrated component of Windows, is an antivirus program. Update: Stop getting error messages and slow down your system with our optimization tool.

Restart the Windows Security Center service.
