Have you tried moving the card to the furthest slot away from mouse/keyboard plugs.
It won't make a difference to the plugs i just needed to identify which slot i meant by furthest away !
I also have radio mouse and keyboard and when I boot my laptop which sits next to the radio point both my keyboard/mouse stop until the laptop establish a network connection and then all works ok. It's just the signal strength interfering with your mouse etc
Sorry just re-read your post....
Try moving the radio access point somewhere else - furthest from your PC you can get it.
If that doesn't work, then it's a drivers problems. Sometime just re-installing the drivers works ok. You may have to un-install 1st at some point to get it all to work.