Consider using a newsreader like Outlook Express or Forte Agent rather than
the web interface to the newsgroups - it's a lot easier to do nearly
everything there, including searching, which is always a good idea to do
before you post, as well as mark messages to be watched, and filter based on
replies to your posts.
The Microsoft public news server is msnews.microsoft.com and you can
subscribe to as many groups as you like.
