Computer Use fails on Windows 10 LTSC with SetIsBorderRequired 0x80004002

Computer Use cannot capture or control application windows.

Error:
SetIsBorderRequired failed: Unsupported interface (0x80004002 / E_NOINTERFACE)

Environment:

• Codex Desktop: 26.616.6631.0
• Computer Use plugin: 26.602.40724
• OS: Windows 10 Enterprise LTSC 2021, version 21H2
• OS build: 19044.7417
• Target application: Unity 2019.4.40f1

Steps to reproduce:

1. Open a Unity Editor window.
2. Ask Codex Computer Use to inspect or capture the window.
3. get_window_state fails immediately with SetIsBorderRequired 0x80004002.

Expected:
Computer Use should capture the window, or gracefully skip unsupported border configuration.

Actual:
Window capture fails, preventing all subsequent UI automation.

The problem persists after rebooting Windows. This may be a compatibility issue where SetIsBorderRequired is called on a Windows.Graphics.Capture interface unavailable on Windows 10 LTSC.