Problem connecting to internet after update

Hi,

I am looking for some advice.  My computer did an automatic update the other night and since then I can't connect to the internet.  At first there was an error code with instructions to download Norton uninstall/reinstall program which I did and that works for 24 hours then it is back to doing the same thing.  I can still access the internet via my phone and Skype still works on the laptop, I just can't access the internet browser.  Any ideas?

Thanks in advance.