Master Boot Record (MBR)

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The Master Boot Record, created when you create the first partition on the hard disk, is probably the most important data structure on the disk. It is the first sector on every disk. The location is always track (cylinder) 0, side (head) 0, and sector 1.

The Master Boot Record contains the Partition Table for the disk and a small amount of executable code. On x86-based computers, the executable code examines the Partition Table, and identifies the system partition.

The Master Boot Record then finds the system partition's starting location on the disk, and loads an copy of its Partition Boot Sector into memory. The Master Boot Record then transfers execution to executable code in the Partition Boot Sector.
http://www.ntfs.com/mbr.htm
http://www.ntfs.com/ntfs.htm

 

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https://www.wikihow.com/Format-a-Flash-Drive

 

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What is Code Injection on Windows?
Code injection is common on Windows. Applications “inject” pieces of their own code into another running process to modify its behavior. This technique can be used for good or evil, but either way it can cause problems.

Code injection is also commonly called DLL injection because the injected code is often in the form of a DLL (dynamic link library) file. However, applications could also inject other types of code that aren’t DLLs into a process. FULL ARTICLE