you guys re-install a lot, i'll do it maybe twice a year(obviously if i run into any problems that need this done i will do it more then twice a year, so probably one average 3 times a year) on all my systems other then my laptop. Doing it anymore then that would be very hard as i have a **** load of data that i would need to back up on my main drive. I have some of it already backed up but there would still be a good 200gigs of stuff needed to be backed up, i don''t have the space to keep it backed up all the time, thats why i need to pick up another 1tb drive and throw it in an enclosure. When i do reinstall, i use an external hard drive.