On the Corel installing problem -
How does it block it? Does it give an error message or some pop message comes up?
Do you have the corel on a old CD/DVD ,or were you downloading the current version from the website to install?

If an older version on disc , that might be an issue.
But you should be able to download the newer version and use your product key if it is a previously purchased program. *Sometimes they do want you to pay , usually a discounted price for the newer/upgraded program, if your version is many years old.