I have about 20-30 '(Unnamed)' entries in my contact directory/address book, which I suspect is allowing remote accounts to email spam directly into my in-box. I tried deleting them, but I get a warning dialog box with following: "Some of there contacts come from another service and can't be deleted. Would you like to just delete the Outlook and Messenger contacts?". Net, I suspect my contact directory/addressbook has been hacked with these records which allow remote bots to spam junk mail directly into my in-box folder. How do I get rid of these entries?

Partial screen shot shown below.