My MBP is having some operating system issues and reluctantly i think the time has come to reinstall . I have backed everything up via time machine. My questions are: 1. Whats the best way to reinstall? is it a clean reinstall so that the machine is effectively like new. 2. I would then need to reinstall all my software. I run XP under parallels and i assume i would need to contact them to allow me to reactivate the software? 3. Is there a better way to restore my data so i dont need to reinstall my software? 4. Some of the software i have (all genuine) were downloaded from the vendors web site. I might not have all of the verification codes. Will they give me a duplicate one? Please be gentle with me as i am nt as techie as i would like to be!!