Where is the Wireless Switch on a HP 6450B laptop?

In HP Probook 6450b, the wireless switch is the wireless led on top of the keyboard, activated/deactived by touch. Colour blue = activated, Red = de-activated.

In case, that HP wireless assistant is saying that WLAN disabled from LAN/WAN switching, then you need to access the BiOS. And un-ticked the LAN/WAN switching. Then, you will be able to control the WiFi from the HP wireless assistant.