you ahve a driver problem, when did this start to happen, can you rememeber installing anything to or on your computer before this started.
are you using a router by any chance?
make sure you ahve the correct drivers for everything you have.
also you will get a good idea of your problem by googling it i have done it for you
CLICK HERE
what is wrong is nothing to bad it is just a process of elimination with your drivers till you find the culprit