I have had two WordPress blogs hacked into in the past. That was at a time when I was doing very little internet marketing, and until I found time to address the situation (months later), these sites were penalised in the search engines. They were not removed, but the rankings were reduced.
Documents can easily get lost if you do not have good protection on your site. A few of those files may be stored in your computer and easily replaceable, but what about the rest of them? If you lose them the first time where are you going to get them from again? Especially for sites which have been in business for a long time, fix wordpress malware scanner is vital. Many times sites have created a number of files and have a good deal of data. Recreating all of that are a nightmare, and not something any business owner would like to do.
Don't depend on your internet host - Many that site people depend on their web host to"do all that technical stuff for me", not realizing that sometimesthey website here don't! Far better to have the responsibility lie with you, instead of out.
Keep your WordPress Installation up to date - One of the easiest and most valuable tasks you can do yourself is to ensure that your WordPress installation is upgraded. WordPress gives a notice in your dashboard to you, so there's really no reason not to do this.
Along with adding a secret key to your wp-config.php document, also consider changing your user password to something that is strong and unique. A great idea is to avoid common phrases, use upper and lowercase letters, and include numbers, although you will be told the strength of your password by wordPress. It's also a good idea to change your password frequently - say once.
Software: If you've installed scripts that are free search Google for'wordpress security'. You will get many tips.