My router is not working properly and I don't know

Setting up the router is very simple.
You dont need the set up disc . you can do it manually.
If you want to reset the router, then you will find a small reset button on the router. hold it for 30 seconds.let it go. Unplug the power to the router. wait for 10 seconds, plug it back in.
Wait for 30 seconds.
now you will need to reconfigure the router.
Click Here for step by step troubleshooting