This is Windows’ way of protecting PCs from other potentially harmful files online. As the Blade & Soul installer is a new online file, Windows is just being cautious.
Always make sure that the warning box contains the correct Blade & Soul app name and NCSOFT publisher as per the screenshots below before following these instructions.
- You can click on the “Run” button in the download dialog.
- Click on the “I understand the risk and want to run this app.” box.
- Then click on the “Run Anyway” button to install. This button will only appear when you check the box.
Per Microsoft’s website:
“It doesn't necessarily mean the website is fraudulent or that the program is malware, but you probably shouldn't download or install the program unless you trust the website and the publisher.”