dolphin doesn't include the vc++ redist or the directx runtimes that are needed, you must install them yourself.
I am surprised that even as a computer technician you do not realize that error 0xc000007b is caused by using a 32bit dll with a 64bit application.
To fix your problem, remove all of the downloaded dll files that you randomly placed throughout your system (again as a computer technician you should know better than this). Install the visual c++ 2010 SP1 redistributable package x64 and the latest directx runtimes (XInput1_3.dll is part of this)
Microsoft Visual C++ 2010 SP1 Redistributable Package (x64)
DirectX End-User Runtimes (June 2010)
I am surprised that even as a computer technician you do not realize that error 0xc000007b is caused by using a 32bit dll with a 64bit application.
To fix your problem, remove all of the downloaded dll files that you randomly placed throughout your system (again as a computer technician you should know better than this). Install the visual c++ 2010 SP1 redistributable package x64 and the latest directx runtimes (XInput1_3.dll is part of this)
Microsoft Visual C++ 2010 SP1 Redistributable Package (x64)
DirectX End-User Runtimes (June 2010)