The most suspicious process to prioritize for examination during live response is notepad.exe. Notepad is a simple text editor and does not typically create network connections, especially to external IP addresses. In the given output, notepad.exe has an established TCP connection to a remote IP address (3.15.24.17) on port 80, which is commonly used for HTTP (unencrypted web traffic). This unusual behavior suggests that notepad.exe might be compromised or being used for malicious activities, warranting further investigation.