I am currently sorting out a friends computer, its a really crappy old dell, and his daughter was skanked on it at a car boot sale in cambridge. I had fully sorted the machine and internet connection last time I was round. Although he didn't even turn it on for a couple of weeks. His daughter then went round, tried to access the net and it would'nt work.
Apparently she did not alter anything, besides simply switching it on and trying to access the net.
The only thing that I have noticed is that there is now no dialtone.
Thanks for taking the time to read this and I hope some of you can shed a little light on the problem.