Need to Make Router Secure No Longer Have Disk?

I'll give you some advise however I'm not going to guide you step-by-step to perform these you can do this by exploring all the settings of your router and getting to know them well I recommend this for any who administrates a home router.

• To protect your router itself (web control panel access): 
• Do not permit wireless connections to the web control panel. 
• Configure a custom username and password for the web control panel.
• As for protecting your wireless network (as your thread title is a bit unclear about what you mean by securing): 
• Enable wireless protection (WEP/WPA/etc...). 
• Enable MAC filtering to disallow certain clients or to permit certain clients only.
• Put in a difficult to guess SSID name and do not broadcast it. I hope it helps.