What is WLAN Optimizer?
It's a small freeware tool for Windows (Vista / Windows 7 / Windows 8 / Windows 10) disabling the periodical background scan activity for wireless networks. It improves latency time of wireless connections. Hence it is useful for people with wireless connections getting lag spikes (especially during online gaming, audio and video streaming).
The application automatically tries to optimize your wireless connection when started. If it works for you, you can make it launch when Windows session starts (e. g. minimized to tray). Closing WLAN Optimizer will restore Windows standard values.