QUESTION: Fix punctuation: comfortable and durable
ANS: * comfortable and durable

QUESTION: Fix punctuation: ifsutildll device cant workNo sound Actually in most cases device problem is because of sys files
ANS: ifsutil.dll device can't work/No sound: Actually, in most cases device problem is because of .sys files.

QUESTION: Fix punctuation: Each time you add content to your site it automagically rewrites the Google sitemap AND notifies Google Your publishing efforts will not go unnoticed by the most popular search engine
ANS: Each time you add content to your site, it automagically rewrites the Google sitemap, AND notifies Google. Your publishing efforts will not go unnoticed by the most popular search engine.

QUESTION: Fix punctuation: If you are travelling with your family and small children the nearby beaches are always a perfect place to spend the day At the hotel you will find a small playground for children to have fun whilst you enjoy the afternoon by the pool or by having a drink at the hotels bar
ANS:
If you are travelling with your family and small children, the nearby beaches are always a perfect place to spend the day. At the hotel you will find a small playground for children to have fun, whilst you enjoy the afternoon by the pool or by having a drink at the hotel's bar.