Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have this weird problem with different WLAN's:

  • I have a laptop owned by university A, with user credentials for their LAN
  • I also have access to 'eduroam', a WLAN that is available at almost every university in Europe
  • There is one particular institute (let's say university B) that's causing trouble. If I connect to eduroam there, everything works just fine.
  • Whenever I go home and use the home WLAN, I have internet connection, but no connection to other PC's on the network.
  • Then I connect to university A again, and connect to their LAN
  • When I get home (WLAN), everything works fine again.

It's almost as if university B screws up some settings, which are fixed by connecting to the LAN of university A. I haven't got a clue what it might be.

Some additional info: * Laptop OS: Windows XP SP2 * Other home PC OS: Windows 7 (usually network traffic is working fine) * In the "broken" state, ping between the laptop and home computer (in any direction) results in 100% loss of packages. ping-ing the router, however, works fine (internet also works fine).

When trying to mount a network share to \\<computername>\<sharename>, windows returns

An error occured while reconnecting Z: to \\<computername>\<sharename>
Microsoft Windows Network : The local device name is already in use.
This connection has not been restored

Trying to navigate to \\computername with explorer returns

Windows cannot find '\\<computername>\'. Check the spelling and try again, 
or try searching for the item by clicking the Start button and then clicking Search
share|improve this question
Is the IP range used at Uni B eduroam the same as the IP range you use at home? – Paul Feb 7 '13 at 20:59
@Paul: not sure, but ipconfig indicates that back home the IP is from the range used by the home router. I'll be sure to check the IP range of Uni B next time I'm there. – Martijn Feb 7 '13 at 21:23

When you get home, and the laptop is in the broken state:

  • Open a command prompt
  • Type ipconfig /release
  • Then ipconfig /renew

This should reset all the settings from the old setup and grab new settings from your home setup.

Hope this helps.

share|improve this answer
I'll definately try this next time I have the problem. Thanks – Martijn Feb 8 '13 at 8:15
This does not solve the problem (sorry): it appears the connection is reinitiated, but the problem persists (also after an additional reboot) – Martijn Feb 8 '13 at 15:14
Maybe I should add that I use wireless LAN at home. – Martijn Feb 8 '13 at 15:15

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.