Please capitalize where necessary: one of the events leading up to world war i was austria-hungary making an ultimatum to serbia in the belief that russia would be deterred from becoming involved by the threat of german support for austria.
A: One of the events leading up to World War I was Austria-Hungary making an ultimatum to Serbia in the belief that Russia would be deterred from becoming involved by the threat of German support for Austria.

Q: by means of an appropriate training app, you can record your training results and track your successes!

A: By means of an appropriate training App, you can record your training results and track your successes!

Q: wifi is available in the business centre and is free of charge.
A: WiFi is available in the business centre and is free of charge.

Problem: as you maybe know, jews have been completely expelled from italian cultural life; in particular, i will not participate in the "volta congress" and will not be in rome in september.
Can you repeat this sentence, but capitalize it?
Answer: As you maybe know, Jews have been completely expelled from Italian cultural life; in particular, I will not participate in the "Volta Congress" and will not be in Rome in September.

Text: tighten thread - you are ready to go.

Correct capitalization: Tighten thread - you are ready to go.

Problem: in the case that your mig file doesn't open, it is highly likely that you do not have the correct software application installed on your pc to view or edit mig file extensions.
Can you repeat this sentence, but capitalize it?
Answer:
In the case that your MIG file doesn't open, it is highly likely that you do not have the correct software application installed on your PC to view or edit MIG file extensions.