Well, the good news is that the 169.254.x.x IP address means that your network adapter appears to be functioning properly -- you usually receive the above IP because the DHCP Server (in this case, your router) can't communicate with your NIC properly. Generally speaking, this is a configuration issue (i.e. if you enter the passphrase/encryption key incorrectly). However, if you disabled encryption and still couldn't connect, that kind of rules that out
The make of the Router / Modem is "Telefonica" (the largest wireless company here in Spain)
I can honestly say, I've never heard of that manufacturer, nor can I find a whole lot of useful information online, so hopefully you're pretty computer savvy.
The first thing I would check for if I was you, would be MAC Filtering. If you login to your router's web interface (via one of your friends machines), look for a section which says something along the lines of "MAC Address Filtering", or "MAC address control", etc. If you find such a section, ensure that it is disabled
Along with this, in your router's settings, ensure that it's Wireless Mode
(exact wording may differ from router to router) is set to allow both 802.11g
Have you tried connecting your laptop to the router with an Ethernet cable; are you able to acquire a connection?
Finally, you may try setting up a static IP on your laptop (for troubleshooting purposes) to see if this allows you to acquire a connection -- I can post more in-depth steps if needed, but would like to see the results of the above checks.
[EDIT] Also, it may be a good idea to remove IPv6 from your machine;
- Press Start
- Select Run
- Type cmd and press OK
- In the new command prompt window, type netsh int ipv6 uninstall
- Restart your computer.
Edited by Dan, 09 February 2009 - 09:23 PM.