Help with Microsoft Outlook

[Kent]

I realize that this is definitely "Off Topic"; however, maybe someone can help. Many of the messages in my Microsoft Outlook folders have a "+" in front of them, and if I right click on the message that has a "+" in front of it and choose to delete the message I get a message that states something about if I delete the message that I will delete all of the "collapsed conversations". Help in Outlook is of no value. If I click on the "+" key I see many messages that I have previously received. Help in Outlook talks about it being related to News Groups. I know my son is involved in some News Groups, but I can't image how many of my messages got collapsed. Any ideas on what caused this, and better yet how to reverse the situation.

Thanks,
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