Microsoft released a security patch or "security upgrade" for Windows XP SP2 machines with wireless NIC’s:
- WPA2 can be configured using group policy.
- A wireless computer can be configured not to broadcast the networks it wishes to connect to.
- A vulnerability for "parked" or disconnected wireless clients has been resolved.
- You must now manually choose to join an ad-hoc network instead of being automatically joined.
Make sure you test the update before deploying.
Credit goes to Michael Kassner for the alert.