Hello, I'm writing an eBook and nearly done... Mi intention is to sell it online but I don't know if I actually need to have copy rights to protect it or if I could just say that nobody is allowed to resell it... What should I do?

How to protect copy rights for my unpublished book if for example I distribute copes to my students or people.

When my computer attack by virus, the technician copy his window to my computer, it is a violation to copy rights?

I wanted to scan and convert to text old hymns so that I can then do a text search on them for key words or phrases and be able to print out a copy if someone is interested in it.