By default, the newest version of WordPress is pretty darn secure. Anything which may have been added to any fix hacked wordpress site plugins has been considered by the development team of WordPress . In the past , WordPress did have holes but most of them are filled up.
Well, we are talking about WordPress but what is the sense of performing security checks and upgrades if your computer is at risk of hackers. There are files which can encrypt key loggers why not try here in your computer. When this happens they are easily able to access everything that you type on your computer. You can find a lot of antivirus programs that are good . Just look for a antivirus program or ask experts.
It's a WordPress plugin. They are drop dead simple to install, have all the features you need for a task like this, click and are relatively cheap, especially when compared to having to hire someone to have this done for you.
Imagine if you go to WP-Content/plugins, can you see that folder? If so, upload that blank Index.html file into that folder as well so people can't see what plugins you might have. Because if your version of WordPress is current, if you're using an old plugin or a plugin with a security hole, someone can use that to get access.
Just ensure you decide on a plugin that's up to date with release and the version of WordPress, and that you can schedule, restore and replicate.