First try a different port on your router. If the issue stops, then there's a problem with the original port on your router.
Second try a different computer (if you can) and connect it using that network connection. A laptop will make this easier. Make sure you disable the wireless on your laptop before testing.
If the problem stops, then you know the issue isn't with the connectivity, but with your computer itself.
Again, it would be helpful if you could take a screen shot of what you are seeing so we can see it. I know it comes and goes, but you need to try harder to help us, so we can help you. List your full hardware specifications. What computer do you have? Is it custom build? If so list all of your independent internal hardware components please.
Either way you're going to have to put effort into this if you want it resolved. Since you don't know much about technology you're likely going to have to pay someone to come out to your residence and troubleshoot the issue since you aren't able to do so.