There are no additional components just the Lion installer download. If you did that already look for it in your Applications folder and launch it.
I opened the application folder clicked on the lion installer click agree then install and it comes up with
There may be something amiss with your download. Try again:
Thank You very much i have installed Mac Os X Lion finally .
I am upgrading from Snow Leopard to Lion using a DVD, not a download, and keep getting the same message mid-install. Any ideas?
Lion doesn't ship on a DVD.
I work for a university. The DVD came from my boss via the university computer store ...
Their help desk doesn't have any ideas.
What I did with this is Reinstalled Snow Leopard and then insalled Lion it worked.
Retrieving data ...