In deleting 40GB of stuff that I longer needed for my Mac, I deleted System Preferences... 1. I tried StellarPhoenix (deleted files recovery program) to no avail. 2. I updated my MacBook to the lastest OS (10.6.8) & the problem wasn't resolved. 3. I tried using Bluetooth & then a USB to place the System Preferences on one my Macs to the one that it is missing on... This didn't work, because the Mac that has System Preferences is on Leopard, and the one that it is missing on is on Snow Leopard... The Leopard system preferences doesn't function on the newer OS I guess. 4. Some people recommend using the installation DVD to recover it somehow but that's been long lost. When I update to Lion, will it be recovered somehow? Is that my only choice? PS I'm pretty stupid when it comes to computers so I apologize upfront if anything I've written above does not make sense.