Picking up WIFI

Someone tell me if this is worth pursuing. I have a net stumbler save showing the signal that I am recieving. It is fairly weak and getting lots of noise. Is it worth getting a high gain antenna of some sort and or possibly relocating the antenna outside of a window to get better reception? For some reason I can pick the signal up with my laptop with a much weaker signal and get on the internet better that with my desktop. Anyone who can help please PM me so that I can send you the netstumbler save.
 
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