Please capitalize where necessary: we suggest you update your existing system to mac os x 10.6 or higher.
A: We suggest you update your existing system to MAC OS X 10.6 or higher.
Q: if you already have a neteller account then you need to register your bank account with neteller. neteller will send a small deposit to the bank account that you registered.

A: If you already have a NETELLER account then you need to register your bank account with NETELLER. NETELLER will send a small deposit to the bank account that you registered.
Q: individuals with surname marcuse
A: Individuals with surname MARCUSE
Problem: are there any special foods you need to eat?
Can you repeat this sentence, but capitalize it?
Answer: Are there any special foods you need to eat?
Text: unfortunately, researchers are unconvinced that lessons will be heeded and, despite the impact of wannacry and petya, predict there will still be organisations falling victim to future ransomware worm attacks because they fail to apply patches.

Correct capitalization: Unfortunately, researchers are unconvinced that lessons will be heeded and, despite the impact of WannaCry and Petya, predict there will still be organisations falling victim to future ransomware worm attacks because they fail to apply patches.
Q: the main cause is genetic, and the symptoms may include: blurred vision, asthenopia, accommodative dysfunction, binocular dysfunction, amblyopia, strabismus.
A:
The main cause is genetic, and the symptoms may include: blurred vision, asthenopia, accommodative dysfunction, binocular dysfunction, amblyopia, strabismus.