[Q] ativ s network problem

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http://forum.xda-developers.com – Hi all! I've just bought an ativ s, and I think it's a good terminal, but I've some problem with network, specially wifi. when i connect to home wifi (that has no problem at all) while I'm in the store I often receive an error message like "you're not connect at the internet". and also i've problem with youtube video (very slow) and sometimes with the browser. also the store is very very slow to start app download... I have no clue, is it possible that I have some malfunction with wifi hardware? sorry for my english ;) and thanks for asking ^^ (HowTos)