Can Time Machine Restore the whole operating system ?

Hi there,
I understand Time Machine can be used to locate files which were accidentally deleted.
But can it restore the whole OS system together with all the settings to say a 2 weeks ago ?
If can, I desperately beg someone to be kind enough to guide & teach me how to do it step by step.
Many thanks

RyanManUtd wrote:
Question 1:
I am doing a full restore on the same Mac. For avoidance of doubt, can you kindly confirm that the first paragraph of item#14 does not apply to me ?
Yup. This works fine if it's the same Mac. That's what it's intended for.
Question 2:
I have a Lacie Firewire800 external HDD connected to my Mac, I have already updated & backup data on this Lacie FW800 HDD to yesterday.
As I intend to restore the entire system to 2 weeks ago, I am afraid that my Lacie would also be restored to 2 weeks ago, would it ?
When you say "entire system", it refers only to the Mac internal harddrive or everything connected to it ?
Ah, yes, that's a bit misleading. That procedure will restore your internal HD only. By "entire system," it really means everything on your internal HD (which is all most users have): OSX, apps, configuration, users, settings, preferences, data.
If you want to restore an external HD, you must do that separately, so your LaCie won't be touched. Just to be extra-safe, I'd eject and disconnect it if I were you.

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