Network Sharing problem

Hey there
Ever since I've upgreaded to Lion, no computer (PC, we don't have any other macs) in my home or work networks can seem to access or view my shared folders. Further more, my Xtreamer can't find my shared folders as well.
It worked perfectly on Snow Leopard.
Can anyone please help me on this?
Thanks!

What happens if you create another user with administrative right ?
S.Sengupta, Windows Entertainment and Connected Home MVP

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