as you know the last time it was working, you can try a system restore. (start / programs / accessories / system tools / system restore... run it and choose yesterday in the wizard) if that doesnt work, you can try to disable the wireless card in BIOS (if BIOS allows that), start windows, reboot, enable it again, and let windows to find it againi fixed some VAIOs that way in the past... i thought they had fixed that shit on w7