hosts on windows 2000 - IIS 5.0 are too easy hackable for turks
the proof all these sites have been defaced and all were on windows 2000 - IIS 5
Migrate to 2003 which is thousand times more secure
(and if you have the money place your website behind a reverse proxy ( another webserver on which you can see the site, interact with it, but can't change anything) - another windows 2003 easy setup server for this is built in)
if someone says linux is safer, just look at the attack statistics and the vulnerability statistics - lists
for belgian sites this were http://www.zone-h.org/en/defacements/filter/filter_domain...
or do you want your website to look like this
http://www.ayyildiz.org/index1.php their work