I had trouble getting one of the computers to connect to my wireless network.
It was my girlfriend’s work laptop running Windows XP Service Pack 2.
It could see the network but timed out with no errors when connecting.
For a while I was convinced that SP2 was the cause and I wasted much time googling along those lines.
I also looked at the firewall settings, to no avail.
Many posts I read had suggested checking if it was being blocked by MAC address.
I had already double checked this as I had added the MAC address (I had worked it out from connecting the laptop through a cable).
So confident was I that I didn’t see the need to disable MAC address blocking – that would be silly right?
Of course, what I didn’t know was that the wireless connection was a separate network card and therefore a different MAC address (seems obvious in retrospect) – in my defence I should add it’s not my laptop and I had no involvement in setting it up.
Once I found this out I disabled MAC address blocking and it worked right away.