Most of us newsgroup old-timers don't work that way.
What we do is set the view to "Hide Read Messages", so the next time
you come back to that newsgroup you see only unread (new) messages.
Every now and then we need to review an older message, which we can do
by temporarily setting the view to "Show All Messages".
If you don't care about ever needing to see already read messages again,
do the following: Tools, Options, Advanced, Maintenance, and select
"Purge newsgroup messages..." and "Delete read message bodies..."
I don't know how rapidly this works since I've never used those settings.

Signature
Gary VanderMolen, MS-MVP (WLMail)
> After I get through checking Usenet News On Vista Home Basic in Windows
> Mail, I then do the following:
[quoted text clipped - 10 lines]
> not to have to go through this each time. I need something that will not
> take a day or two to work as I check the news groups several times a day.
Dennis - 06 May 2008 02:04 GMT
> Most of us newsgroup old-timers don't work that way.
> What we do is set the view to "Hide Read Messages", so the next time
[quoted text clipped - 21 lines]
>> not to have to go through this each time. I need something that will not
>> take a day or two to work as I check the news groups several times a day.
Thanks Gary,
I set it to mark all messages read on exit and then Hide Read Messages and
this will work fine.
Thanks Again,
Dennis

Signature
Don't worry about what people think;
they don't do it very often.
Gary VanderMolen - 06 May 2008 05:43 GMT
You're welcome. Thanks for your feedback.

Signature
Gary VanderMolen, MS-MVP (WLMail)
>> Most of us newsgroup old-timers don't work that way.
>> What we do is set the view to "Hide Read Messages", so the next time
[quoted text clipped - 28 lines]
>
> Dennis