This is my second day with Ubuntu, having got 10.04 LTS installed on my new PC. It worked well for a day, then did not shut down properly. After turning the power off manually, then re-booting some hours later, neither Chrome nor Firefox could access the internet. I re-started Ubuntu with its own power button, which seemed to work OK. But still no internet. It worked before the failed shutdown, and there are no problems getting the internet with Windows with the same network (that's how I am posting this!) Can anyone help me?