Windows 7: IE 9 rejects some cookies

When trying to sign in to some of Yahoo's pages on my Win 7 computer with IE 9, I get the message that the cookie is rejected. Other site's cookies are accepted OK. I have gone through all the suggested solutions for accepting cookies and none seem to fix the problem. I have another Windows 7 computer with IE 9 and it accepts the yahoo cookies just fine, in fact the yahoo cookies show up in the temp file on this computer, but not the other. All the internet options settings are the same on both computers.

Perhaps it is a sign to pick a new (and better) browser?
:P