Problem-example (which probably everyone knows):
AM2 motherboard -> defect
New Mainboard ago ... shit, there's no AM2 boards more ... So has an AM3 board fro ...
Crap ... that runs on DDR3 and a new chipset .... So ... new processor, a new board, memory, etc. fro ...
MIST. System will not boot.
MIST. One would now make some settings to the registry, so if you reread the Internet, what happens if you change the motherboard.
MIST. The old board is broken so ...
Solution! Simply Paragon P2P let assistants go through briefly once. Time required for booting from CD: 3min .... time assistant: 10-20 seconds.
After the system starts, as if nothing had happened and automatically binds a new driver (Win7) or demanded just this (CD, Internet downloads) ....
INGENIOUS! (Especially if you are not a professional) ... professionals appreciate the quick implementation .. no registry fumbling with external boot CDs etc.