I have had a couple of computers where the Internet seems to just stop. But this only seems to appear in Internet Explorer. I could access the internet through Firefox, and I could ping Google.

To fix this, I usually just leave the user with Firefox, which isn't the best. I managed to find a fix today, which involves the following command. Open up the run window, and paste the following command, then run it. Make sure IE is closed first.

netsh winsock reset catalog

Then, once this command has been run, open IE and everything should be wonderful with the world!