New Macbook Pro wireless problems

Hi there,
I have a brand new Macbook pro and I keep loosing my wireless connection. I have a Mac Mini and I have the same issue. In the same room is 3 PC's and I don't have any problem. The access point is 5 meters from this room. I think that this problem started after the last update released by apple. I never had any problem with my Mac mini since my last update. Can someone please inform me if this is a knowned issue or if there is any fix to this problem? Thanks in advance. Sorry about my english, it's not my native language.;D

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