Yes, your hard drive wears off faster, as result it can fail earlier.
Basically, it means to prepare the computer for use.
Reformatting
Reformatting
We cure viruses by reformatting the computer's CPU.
No. Files can be deleted accurately without reformatting. Reformatting is for completely deleting the entire drive's contents and re-establishing the file structure. This is usually used to repair a damaged file structure, or permanently erase all contents of the disk. (Although methods of undoing or recovering still exist.)
Reformatting basically clears all the user data from the hard disk or whatever device is involved. It restores the device to its original setting and configuration when it is empty. Reformatting is useful when: -You want to empty your storage device. -Rid your storage device of all virus and random stuff. That's all I can think of now. :D
Try reformatting it.
Yes.
Reformatting is the best solution for a messed up registry.
Unless the disc is damaged and so needs reformatting you can run the Mac OS installer over an existing Mac OS.
No, flying over North Korea without permission can result in restrictions or consequences.
There really are none, most everyone has an over-bite.