Is there a reason this port is open, a quick Nmap scan and Nessus scan reveal it's open, why?

Are there any ramifications if I close this port via the firewall rule set?

Or does anyone here now more info about this port besides Google?

WTF? 1)http://www.symantec.com/connect/blogs/who-left-tunnel-door-open-windows-firewall-vista-0 I know the talk is about Vista, but I am pretty sure it's the same port on 7, also.

2)Port 5357 common errors:The port is vulnerable to info leak problems allowing it to be accessed remotely by malicious authors. (Web Services for Devices)

I am blocking this crap, if I have issues will just re-enable. Damn windows.

Inbound rule for Network Discovery to allow WSDAPI Events via Function Discovery. [TCP 5357] You just got blocked, until I break something, will see.

Time to re-Nmap and re-Nessus. Nmap scan 0 open ports after closing Port 5357,Win7 still works for now, one more scan with Nessus just to make sure all is well.