Is Windows Defender effective against viruses?

Yes, Windows Defender is effective against viruses. It is a comprehensive security solution that provides real-time protection against malware, including viruses, worms, Trojans, rootkits, and spyware. It also defends against potentially unwanted applications (PUA) and other malicious software. Windows Defender runs in the background and scans files being opened, downloaded or executed on your computer. It can also detect and remove worms and other malicious software.

Windows Defender is an anti-virus program which was originally developed by Microsoft Corporation and released as part of Windows 8. Windows Defender has undergone several major updates over the years, with the most recent version (Windows Defender Security Center) providing both pre- and post-infection protection.

Windows Defender is built into the operating system, so it is always running and monitoring your PC for malicious activity. It detects and blocks malicious programs before they have a chance to install on your system. It also helps protect you from phishing attacks and scams, and can block malicious websites.

One of the key features of Windows Defender is its ability to periodically perform full system scans and detect any viruses, worms or Trojans present on your machine. It will then either remove them or quarantine them in order to prevent any further damage. It also analyzes the behavior of any suspicious files, allowing it to detect new threats quickly and accurately.

In addition to its anti-virus capabilities, Windows Defender also comes with a number of additional features such as cloud-based protection, real-time protection and protection against malicious websites. The cloud-based protection function uses Microsoft’s own cloud computing resources to analyze billions of websites and data samples in order to identify and block malicious activity. Real-time protection means that Windows Defender will scan all files that you open, download or execute, giving you an extra layer of protection against online threats.

Overall, Windows Defender is an effective anti-virus and security solution that provides users with a comprehensive set of features to help keep their systems safe and secure. Its real-time protection, cloud-based protection and protection against malicious websites give users added peace of mind when they are connected to the internet. Additionally, its ability to quickly and accurately detect and remove viruses, Trojans, worms and other malicious software, make it an extremely valuable tool for protecting your system.