The fix malware problem Codex has an outline of what permissions are acceptable. File and directory permissions can be changed either through an FTP client or within the page from your web host.
Should the server of your site go down, everything you have worked for will proceed with this. You'll make you could try this out no sales, get signups or no visitors find out this here to your site, and in short, you are out of business until you have the site.
Harness Scanner goes through the files on your website database, comment and post tables. You are also notified by it for plugin names. It doesn't remove anything, it simply warns you for threats.
Note that you should only try this last step for new installations. If you might like to do it for existing installations, you have to change all the table names inside the database.
Change your password, often, read this or admin username and your WordPress password and collect and use other fantastic WordPress safety tips to keep hackers out!