Question: this allows the intelligence of windows to decide the correct software application to open your kma file.
Answer: --> This allows the intelligence of Windows to decide the correct software application to open your KMA file.

Question: in particular he began research on engineering problems and problems relating to fortifications.
Answer: --> In particular he began research on engineering problems and problems relating to fortifications.

Question: considerably faster cpu clock speed
Answer:
--> Considerably faster CPU clock speed