I've had two WordPress blogs. That was at a time when I was doing almost no online advertising, and until I found time to deal with the situation (weeks later), these sites were penalized in the main search engines. They weren't eliminated the ratings were reduced.
By default, the latest version of WordPress is pretty darn secure. Anything which may have been added to some fix wordpress malware removal plugins has been considered by the development team of WordPress . In the past , WordPress did have holes but now most of them are stuffed up.
Don't depend on your Web host - Many people rely on their web host to"do look at this now all that technical stuff for me", not realizing that sometimes, they don't! Far better to have the responsibility lie instead of out.
You need to create a new user with administrator rights, before you can delete the default admin account. To do this go to your WordPress Dashboard and click on User -> Create New User. Then enter all the information you will need to enter.
BACK UP your website regularly and keep a copy on your own computer and off-site storage. Back if you have a website. You spend a whole lot of money and time on your website, don't skip this! The one solution that does it all is BackupBuddy, no additional plug-ins back up widgets your documents, database and plugins. Need to move your website to another server, this will do it Get More Info in less than a couple of minutes!
Don't use wp_. Web hosting providers are removing that default but if yours does not, adjust wp_ to anything else but that.