I scanned both localhost, and the IP address of the LAN adapter, and this is the produced output.
Starting Nmap 5.51 ( http://nmap.org ) at 2012-10-12 18:06 Eastern Daylight Time Skipping SYN Stealth Scan against localhost (127.0.0.1) because Windows does not support scanning your own machine (localhost) this way. Nmap scan report for localhost (127.0.0.1) Host is up. PORT STATE SERVICE 1/tcp unknown tcpmux 3/tcp unknown compressnet 4/tcp unknown unknown 6/tcp unknown unknown 7/tcp unknown echo 9/tcp unknown discard 13/tcp unknown daytime 17/tcp unknown qotd 19/tcp unknown chargen 20/tcp unknown ftp-data -------redacted-for-posting-purposes------- 60020/tcp unknown unknown 60443/tcp unknown unknown 61532/tcp unknown unknown 61900/tcp unknown unknown 62078/tcp unknown iphone-sync 63331/tcp unknown unknown 64623/tcp unknown unknown 64680/tcp unknown unknown 65000/tcp unknown unknown 65129/tcp unknown unknown 65389/tcp unknown unknown Nmap done: 1 IP address (1 host up) scanned in 0.11 seconds
Unknown for all ports scanned. I then proceeded to scan "scanme.nmap.org", and had regular output as expected upon scanning that service.