hello i have a question about my box(computer) ports i have widnows 2000 sever and i scaned my ports useing NmapWin v1.3.1 and i have me this.

Starting nmap V. 3.00 ( www.insecure.org/nmap )
Insufficient responses for TCP sequencing (2), OS detection may be less accurate
Interesting ports on ??? (???.???.?.???):
(The 1578 ports scanned but not shown below are in state: closed)
Port State Service
7/tcp open echo
9/tcp open discard
13/tcp open daytime
17/tcp open qotd
19/tcp open chargen
21/tcp open ftp
25/tcp open smtp
42/tcp open nameserver
53/tcp open domain
80/tcp open http
135/tcp open loc-srv
139/tcp open netbios-ssn
443/tcp open https
515/tcp open printer
548/tcp open afpovertcp
1025/tcp open NFS-or-IIS
1029/tcp open
ms-lsa
1030/tcp open iad1
1033/tcp open netinfo
3372/tcp open msdtc
3389/tcp open ms-term-serv
6666/tcp open irc-serv
7007/tcp open afs3-bos
Remote OS guesses: Windows NT 5 Beta2 or Beta3, Windows Millennium Edition (Me), Win 2000, or WinXP, MS Windows2000 Professional RC1/W2K Advance Server Beta3
Nmap run completed -- 1 IP address (1 host up) scanned in 20 seconds

is my ports on this box safe or not what should i do to keep them close ?