I have exactly the same problem.
I'm not sure if this is Killer Driver Issue. The drivers on killer drivers webpage are for windows 8/8.1 but for some reason error appears "Your hardware is not supported on this Windows Version. The installer can not continue."
btw. my motherboard is Z87-GD65
install latest drivers from: http://www.killergaming.com/support/driverdownloadsupport
Installer/Software Suite: 220.127.116.117
E2200 driver: 18.104.22.168
BWC driver: 22.214.171.124
BT suite: 126.96.36.1996
- Updated Win8.1 Wifi drivers to WHQL 10.0.1.268
- Updated Bluetooth Suite to 188.8.131.526
- Added Software version printing to KillerDiagnose
This is the answer Svet provided for me, these drivers work, but now I'm having connection issues, the net connection is lost for a few seconds although the reception bars are always full... I wasn't getting any disconnection issues but after updating to windows 8.1 the micro disconnections are unbearable... I'll switch to trusty old windows 7, not even windows 8...