SO I am going to give Lion another try. My first experience with it was laggy and system freezing. I have never used time machine before so I have a few questions. After I back my current system on time machine I will download the OS X Lion installer, then install Lion. After all is done, and Lion turns out to have the same slow performance. Do I just use my Snow Leopard DVD and reinstall snow leopard, then during the migration assistant, I plug in my Time Machine hard drive and just simply migrate everything back? Besides the files, does it also migrate the settings? and remove the stuff I removed in my previous SL install(iLife)? Please leave a comment if you need any kind of clarification. This is my first experience with Time Machine, I've read about it before but never actually used it.