I was told to access 192.168.0.1 to make my computer secure but am not sure what steps to take

I am assuming you are talking about a wireless router and are asking how to secure it.

First, plug your computer DIRECTLY to the router via an ethernet cable.

http://192.168.0.1
http://192.168.1.1

One of the above addresses should open the configurations of your router. If you open the configuration, you will be prompted to input a password/username.

If you do not know the "default" username/password, then look at the following link to find your router.
http://www.phenoelit-us.org/dpl/dpl.html

If there has already been a password change and you do not know the password, you will have to reset your router. You can reset your router by looking at the back of it for a reset button and holding it in for about 10 or so seconds with it powered on. The reset button is usually pretty small and requires a ball point pen or something small tipped to press it. Resetting the router puts all settings back to factory default...including password.

Okay, now you should have access to the configurations of the router.

Things you want to change:
1. Password for the router
2. Under "wireless"options, change it so that it uses encryption like WEP or WPA.
3. Disable any options for "remote management".

When you added encryption, if you were connected wirelessly...you got booted off the router. That is why you need to connect via an ethernet cable. You will need to go back to your wireless settings in router and copy down the WEP/WPA "security key" it randomly made up. Some routers have you make the security key up yourself, so there would be no need to go look it up on the router.

Take the above security key and input it when you go to connect to your wireless connection and are prompted to input the "security key". Without the security key, you can not access the router.

Those are the basics to securing your router. There are more advanced tactics, but offer little to no protection if someone has bypassed the WEP/WPA encryption. If a person knows how to bypass the security key, then they more than likely also know how to bypass things like MAC Address filtering.

There is no real protection from a hacker, nothing is hack proof. The most you can do is make it that much harder for someone to gain access to your network or computer.

Hope this answered your question.