How does a time machine backup work - does it just restore files it knows has changed

[imac123]

If I decide to revert my drive back to what it was a week ago using time machine, will it replace EVERYTHING clean or will it simply adjust the files that have changed since that time?

 

[italiano40]

it will take the files it has backed up and replace all of them

 

[imac123]

oh, and does it change anything w/ the bootcamp partition at all or does it leave that as is?

 

[italiano40]

it will leave the bootcamp partition completely alone.