Getting bumped off wireless network

Okay I will try and be brief and hope someone has seen this before.

I have a relatively new HP running Vista and can connect to the wireless at work no problems.

Then my partner turns on their HP and I get bumped off. My partner on my other shifts run acers/toshiba etc and we have no problem. I tried to get her to disable wireless and run wired but the problem still exists. She and won't let me even look at her computer as she is worried she will lose her home setting. I was quite happy for the last two years till she brought her new one in. Any suggestions?

 

Can you try changing your Computer Name?

 

I did check that and our names our both unique. Still stumped.