If you discover an unfamiliar open port, you can track down the exact software running it using its Process ID (PID). Note the number from your netstat or PowerShell search. Press Ctrl + Shift + Esc to open the Task Manager . Navigate to the Details tab. Click the PID column header to sort numerically.
Disable legacy network protocols that are frequent vectors for ransomware exploits, such as SMBv1 (Port 139/445). windows 11 open ports
If a misbehaving application won't release a port: If you discover an unfamiliar open port, you