Since you boyfriend's system works, you need to look at your system itself.
1 - determine if you can connect to the network (not internet). If you can't you need to address the network connectivity issue first.
2 - assuming you CAN connect to the network, do these steps:
-- ping the IP address of your computer.
-- ping the IP address of your default gateway.
If you cannot ping then you need to look at your NIC or Wireless NIC (whichever you use).
If you can ping and get replies, you know the connection is good. This points to software as the likely problem.
3 - Look for IE highjacking applications and spyware. I prefer IOBIT System Care (free version). You may have to download on boyfriend's system and save the file to a CD or pen drive, then install it that way.
- Once you run the install, it will scan the system. Make the appropropriate fixes and then click on the UTILITES button of the application. Choose TCP/IP tuneup and appy the recommended settings.
See if this helps.
4 - click on start, then run and type in MSCONFIG and hit enter
click on the services tab and then check the box that hides all MS applications
uncheck all the remaining boxes in the window
restart the computer
see if you can connect now
5 - If you still cannot connect, post the results and we can look at the next steps