one of the "games" he studied there was that of two duellists who approach each other with a loaded pistol.

How would the previous sentence be correctly capitalized?
Answer: One of the "games" he studied there was that of two duellists who approach each other with a loaded pistol.
hpz3lw72.dll device can't work/no sound: actually, in most cases device problem is because of .sys files.

How would the previous sentence be correctly capitalized?
Answer: hpz3lw72.dll device can't work/No sound: Actually, in most cases device problem is because of .sys files.
the name sarantoya seems to be difficult for quite a few.

How would the previous sentence be correctly capitalized?
Answer: The name Sarantoya seems to be difficult for quite a few.
make address entry easy for your users.

How would the previous sentence be correctly capitalized?
Answer: Make address entry easy for your users.