Running a full system scan on Windows 11 is essential to keep your computer safe from viruses, malware, and other threats. This quick guide will walk you through the steps needed to perform a full system scan using the built-in Windows Security tool.
How to Run a Full System Scan on Windows 11
Running a full system scan on Windows 11 is crucial for identifying and removing any harmful software that might be lurking on your computer. By following these steps, you’ll ensure your device is secure and running smoothly.
Step 1: Open Windows Security
Click on the Start menu, type "Windows Security," and press Enter.
Windows Security is your go-to built-in tool for all things related to system protection. When you open it, you’ll see various options like Virus & threat protection, Account protection, and more. It’s important to ensure you have the latest updates before starting your scan.
Step 2: Navigate to Virus & Threat Protection
Click on "Virus & threat protection" from the list of options.
This section is where you can manage your antivirus settings and perform different types of scans. You’ll see options for Quick scan, Full scan, Custom scan, and more. We’re focusing on the Full scan to thoroughly check your entire system.
Step 3: Select Full Scan
Under the "Current threats" section, click on "Scan options," then select "Full scan" and click on "Scan now."
Choosing the Full scan option instructs Windows Security to examine every file and program on your computer. This is more time-consuming than a Quick scan but is comprehensive and will catch threats that may be missed otherwise.
Step 4: Wait for the Scan to Complete
Allow the scan to run its course, which may take some time depending on the size of your files.
During the scan, it’s best to avoid using your computer for resource-heavy tasks. Depending on how many files you have, it could take anywhere from an hour to several hours. Patience is key!
Step 5: Review and Address Any Threats Found
Once the scan is complete, review any threats found and follow the prompts to remove or quarantine them.
After the scan finishes, Windows Security will provide a report. If any threats are detected, the tool will offer solutions to remove or quarantine them. Make sure to take immediate action to keep your system secure.
After completing these steps, your computer should be free from harmful threats. Windows Security will generate a report detailing any issues found and actions taken. If no threats are detected, your system is clean and safe.
Tips for Running a Full System Scan on Windows 11
- Always ensure Windows is up to date before starting a scan.
- Close unnecessary applications to speed up the scanning process.
- Schedule regular scans to maintain ongoing protection.
- Consider using an additional, reputable antivirus software for more robust security.
- Keep an eye on system performance during the scan to avoid potential slowdowns.
Frequently Asked Questions
How often should I run a full system scan?
Ideally, run a full system scan once a week to ensure ongoing protection.
Does Windows Security offer real-time protection?
Yes, Windows Security provides real-time protection to guard against threats as they arise.
Can I use my computer while a scan is running?
Yes, but it’s best to avoid resource-heavy tasks to speed up the scanning process.
What should I do if threats are found during the scan?
Follow the prompts to remove or quarantine the threats immediately.
Is Windows Security enough to protect my computer?
While it’s effective, consider using additional antivirus software for more comprehensive protection.
Summary
- Step 1: Open Windows Security.
- Step 2: Navigate to Virus & Threat Protection.
- Step 3: Select Full Scan.
- Step 4: Wait for the Scan to Complete.
- Step 5: Review and Address Any Threats Found.
Conclusion
Running a full system scan on Windows 11 is not just a one-time task; it’s an integral part of maintaining your computer’s health and security. Windows Security is a powerful tool that comes pre-installed, making it accessible and convenient. Regular scans can prevent potential threats from causing serious damage to your system.
If you’re new to using Windows 11, this guide should help you feel more confident in managing your system’s security. For more advanced protection, explore additional antivirus programs that can work alongside Windows Security. Always stay vigilant and proactive in keeping your computer safe.
Remember, a secure computer is a happy computer! So, take the time to run those scans and keep your digital life running smoothly.

Kermit Matthews is a freelance writer based in Philadelphia, Pennsylvania with more than a decade of experience writing technology guides. He has a Bachelor’s and Master’s degree in Computer Science and has spent much of his professional career in IT management.
He specializes in writing content about iPhones, Android devices, Microsoft Office, and many other popular applications and devices.