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okay we need your help.. I've been reading about alot of problems with the dell latitudes. my roommate downgraded from windows vista to windows 7& now he isn't catching a wireless signal at all. he said he has tried uninstalling & reinstalling the drivers. I've read about so many problems, that we just don't know where to start. most of the forums I read had to do with Verizon & a linskeys router, but we have an arris modem&router. I've read problems about updating the memory, disabling Bluetooth, "hiding an ssid?"..... please help! I need a list of everything/anything that could be causing this problem! thanks :/