It's only a suggestion; suck it & see!
Noticed similar problem behaviour in a Vista laptop when my Netgear router had uPnP ON & my XP PC kept connecting to an "Internet Gateway" Network Connection. Switched it OFF and problem went away on Vista & "Internet Gateway" disappeared on XP.
Look out for an "Internet Gateway" Network Connection on XP.
EDIT: Quick and dirty way of testing for problem at home: Switch uPnP ON on home router, probably reboot PC and see if issue now happens at home.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC
Edited by XRaySpeX (Mon 13-May-13 17:14:29)