After i download belkin n150 wireless router where do i find security key
More about after download belkin n150 wireless router find security
Hello and welcome to Tom's Hardware Forums.
You can't download a router so I assume you mean your computer can "see" the router broadcasting a signal and it's asking for the key.
If it's your own router and you can cable to it, the instructions in our Sticky Post on this subject. http://www.tomshardware.co.uk/forum/38111-18-find-change-wireless-security will help you.
Please post back if you need more advice.