kaled - 10:00 pm on Jul 20, 2008 (gmt 0) Kaled.
Drivers can be installed in any order (provided they work properly).
Unless the new motherboard is identical to the old (right down to the bios version) you can expect driver problems.
they replaced the motherboard
Of course the hard disk is formatted, it boots and runs. Do you have an XP/Vista disk? If yes, you can begin a clean install. You may need to download drivers, but in many cases, generic drivers on the Windows CD/DVD are good enough (if not ideal).
the HDD is fully formated and reformatted few times