I just upgraded my Acer Aspire 5810tg from Windows Vista to Windows 7 Ultimate 32 bit (which made it run at least twice as fast) but I am still encountering the same problem that has been bugging me for as long as I can remember, I even think it has gotten worse:
The wireless network connection seems to cut off every minute (on Vista it wasn't that often), but Windows isn't notifying me, it is just skype cutting off in mid-conversation and the browser telling me it has no connection. Also, the bandwidth is only a third of the bandwidth I get with the other Notebooks connected to the router. At first I thought it might be an issue with the driver, since Windows grabbed it on it's own, but i downloaded the official driver from the Acer-website and installed that, but still I had the same issues. The only thing that seems to have gotten better by that, is that the bandwidth is up from 5 Mbit/s to about 12 Mbit/s, still the other laptops reach 16 Mbit/s downstream.
I hope the information I gave in this text can help identifying the problem and I thank you in advance for trying to find a solution.