Yesterday I installed Ubuntu 11.04 with 8.10 already installed and since then my Dell VOSTRO laptop gets shuts down automatically every half an hour. Although I am using the latest version (currently 11.04) I did not uninstall 8.10 while (as per the guiding option of Ubuntu). Since this installation I am facing the sudden shut downs often.
Hence I want to remove the older version from my system. How can I do this?