I have a buddy that just returned from a business trip where he connected to a DSL connection at a hotel. He connected via a line, not wirelessly, but didn't have to type in any sort of connection username or password in order to get access. Upon returning home, he discovered that his computer was connecting to his wireless connection, but some applications--namely IE, Firefox, or Outlook--are unable to connect to the internet. Other applications, such as Skype, have no problems connecting.

His wife went with him on the trip, connected in the same manner, and has had no problems upon return. They are both running Windows XP.

Has anyone run into this sort of issue before? And does anyone have suggestions towards a solution?