I have a Macair. I ran the remote disc to install SL. The first time did not work. The second time I tried a BOOT from disc and that worked. Everything seems fine- but now- on the desktop- I have a second Hard Drive icon under my system icon. The second HD icon labeled Install OS X. All I can think happened is I made a clone of the update disc to my system??? I can eject it. But it re-appears on re-boot. How do I get rid of it?