A visitor to my site mentioned that the first page had several lines of random text with links to various spam-type URLs at the top of my page. Everything looked okay when I visied my site later, but I found that there was a new, unknown Admin user in my Users section. Obviously, it was an unauthorizedd account, and it used my email address, but with a .co instead of .com. I deleted the account, but wonder whether there is something that I can do, like installing a particular type of plugin, to avoid this issue and similar ones. Thanks.