Hi, I just joined this forum because I usually try to figure things out on my own, but not sure what to do about this one. I used Appdelete to sort through redundant files (as I have before with success) yesterday and accidently deleted multiple programs. Some of which I'm not sure were there, or what they are, but apps aren't running like they used to. Now everything is grouped together in files labeled as Appdelete, then whatever the program is, and they don't work. I last backed up on Lacie ext. drive on 8/28/10, and have copied the backup folder to my desktop, but now seem to have multiple files from the original HD and the backup. I don't even know the process to recover info from backup, or how to completely erase my current HD thats missing some files, and replace it with my backup. My whole dock disappeared, as those programs were Appdeleted. I can run programs from the backup that I copied from the ext. drive, but not from my original HD. Not all apps were deleted, but Textedit, Timemachine, all my Office programs, and other menial apps that came with Snowleopard. I just want my old computer back, and can't seem to find a good link to using my ext. hard drive. Any help is greatly appreciated. I don't think I had Timemachine turned on. There's an icon at the upper left of the screen that I would left click, then select "backup now". I think that's Timemachine. I'm also not sure how to boot from my snowleopard disk. Tried shutting down then restarting with the disc in. Messed around in Disc Utility a little. Can't figure it out though.