Please capitalize where necessary: before buying a vacuum cleaner dyson dc30 portable specify all your options, equipment, appearance and warranty from the seller. please note that we are not engaged in the sale and manufacture warranty.
A: Before buying a vacuum cleaner Dyson DC30 Portable specify all your options, equipment, appearance and warranty from the seller. Please note that we are not engaged in the sale and manufacture warranty.

Q: mfc80kor.dll device can't work/no sound: actually, in most cases device problem is because of .sys files.

A: mfc80KOR.dll device can't work/No sound: Actually, in most cases device problem is because of .sys files.

Q: dictionary - indonesian - latvian
A: dictionary - Indonesian - Latvian

Problem: it supports different output dvd quality, so you even can burn 7 hours movies to one dvd disc.
Can you repeat this sentence, but capitalize it?
Answer: It supports different output DVD quality, so you even can burn 7 hours movies to one DVD disc.

Text: you can access all e-horoscopes from your "my astro" profile.

Correct capitalization: You can access all E-Horoscopes from your "My Astro" profile.

Text: passive smokers are exposed to two kinds of smoke.

Correct capitalization:
Passive smokers are exposed to two kinds of smoke.