I have an old Dell machine running XP SP3 using a Fry's Wireless N USB adapter.
At home and work I am using the same exact model of the Netgear N300 wireless router.
At work, the computer starts up, connects to the Wi-Fi, and stays connected the whole time.
At home, the computer starts up, does not automatically connect to the router (although sometimes it does), and has intermittent connectivity. Sometimes it works fine, other times the wi-fi connection to the router drops.
I have tried two different routers at home and still the same problem.
I am not sure what is happening since it is connecting to the exact same router at home and work so it is not a compatibility issue that I can think of.
Both routers are set to different SSID's, but they are not hidden and use the same encryption settings.