New Modem for Internet

I had a talk with hubby last weekend telling him that I need a modem for our internet. I also need  a  Security Software . I installed one in my laptop but the anti-virus security coverage is not full.  We know how important it is to have an anti-virus software in  our PC.

The wireless connection is not working with our modem. I don't have any idea what is wrong with it. I already  tried many times how to fix it but with no avail.  Sometimes, our internet connection is not good. I guess it is because of our old modem. I hope we can fix it next month.