Possible Duplicate:
How to install software or upgrade from old unsupported release?
When I open my update manager I get a window saying:
Your Ubuntu release is not supported anymore.
You will not get any further security fixes or critical updates. Please upgrade to a later version of Ubuntu Linux
when I close the window it says the newest upgrade is ubuntu 11.10.
When I'd like to run it it says error...?
what to do?
thanks!
