![FIX: 'Windows protected your PC' on Windows 10/11. FIX: 'Windows protected your PC' on Windows 10/11.](https://www.repairwin.com/wp-content/uploads/2023/05/image_thumb-150x150.png)
FIX: 'Windows protected your PC' on Windows 10/11.
If you have downloaded and installed a legal application from the Internet and you can't open it, because "Windows protected your PC", continue reading below to fix the problem. In Windows 10/11, the built-in security program "Windows Defender Security" has a security feature called "SmartScreen" to protect your computer from potentially malicious programs and websites.