Linux Mint with Cinnamon is supposedly the best as of today for ease of use and install.
If you want security in the highest form, OpenBSD has a DVD download that has added security for all the normal packages l, which do come bundled. The complete package should be solid, but not as easy to modify as other BSDs or Linux distributions.
These are the only two worth exploring, in my opinion, unless you jump to Apple.
OK, and now the English version of that? While not helpless with computers, I`m NOT, by any means, a techie. (The where and how)