Can't sign into Office Live- Webpg goes nuts HELP!

Not a tech description I agree!
I have a new PC running Vista and Kapersky with Office 2007. If I am on an office programme and I want (for eg) some clip art from online, I hit Look online from within the programme and the sign in box comes up for Office Live. I sign in and everything goes pear shaped. At the top in URL address box, it flicks constantly between two office online web pages. At the bottom it flicks between "Done" and "searching for web site " followed by the Http address(in numbers). I can't get out of it other than closing down explorer.
Last week I was unable to download templates to POwerpoint, but the problem fixed itself when I installed Office service pack 2.
I can't get tech support from MS as when I try it asks me to log in.
I have disabled the pop up blocker so pop ups are ok.
This is SOO frustrating, can anybody help please?
Thanks!

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