Hello,
The error may be related to network or proxy restrictions. You can try downloading the ISO directly using the links below. These are Microsoft download-server URLs supplied for Windows 11 Korean-language ISO files. Please note that the links are time-limited and may expire.
1. Windows 11 Korean ISO — x64 (Intel/AMD 64-bit)
2. Windows 11 Korean ISO — ARM64
How to check your processor architecture
- Open Settings → System → About.
- Look under Device specifications → System type.
- If it indicates an x64-based processor, use the x64 ISO. If it identifies an ARM-based processor, use the ARM64 ISO.
Official Microsoft instructions: https://support.microsoft.com/en-us/windows/experience/find-information-about-your-windows-device
Official Windows 11 download page: https://www.microsoft.com/en-us/software-download/windows11
Please ensure you select the correct architecture and language for your device before installing Windows. Downloading an ISO does not install Windows by itself.