Two laptops one keeps dropping from router

[#1]

Quote from: npr

Try configuring a different wifi channel in the router. Channels to try are 1, 6 and 11, stick with whichever gives the best result.

I have tried every one, but it made no difference 

[#2]

Seeing as how the Win 7 lappie works ok, the probem sounds like its with the Vista laptop.
Might be worth checking that Power saving mode is disabled on the Wirless adaptor http://louisville.edu/it/departments/communications/wireless/disable-power-savings-mode-for-the-wire...