Please, DON'T forget to deauthorize your PC before you get rid of/reformat it. I've made the mistake of not deauthorizing a few times. There were a few times where I forgot to deauthorize before reformatting it, and the time I forgot to deauthorize before reformatting it for the last time and giving it to my cousin. I fixed it with "Deauthorize all" last year, but you can only do that once a year.