I dont think that the XP machine is hurting you...other than the fact that XP is getting more and more hackable by the day. I'd either disconnect that machine when not in use (shut it off or disconnect the network cable) or find something running win7.

When you say "cannot get an IP address" - is this what it says on your phone/tablet/wireless device or is this the wi-fi router saying that it can't get an address from your ISP ?

-John

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2009 Kia Sedona
2009 Honda Odyssey EX-L
12006 Jetta Pumpe Duse
(insert Mercedes here)

Husband, Father, sometimes friend =)