So I finally got my imac the other day, and being a noobie to the Mac OS. I Have already screwed up. I installed some software and it did not work the way I expected, and cannot figure out how to properly uninstall it and its plugins. I also didnt have the common sense to do a time machene backup. So I am in need of a way to do a clean install, as in like it was when I got it from the factory. Can anyone tell me the best way to do it? The iMac did not come with restore dvd's as that seems to be the new apple standard. I was going to "reinstall Lion" thing in the menu I get when I hold command + r at boot, but it gave me a estimated install time of at least 24 hours, and after doing some reasearch I found out that it may not actually wipe the drive before installation.