I am using site5.com to host a joomla website and then a simple HTML website. This site has said that one of my sites with a script may be compromised (only site that has any scripts is the joomla site). This site is version 2.5.28 -- I can't update it because when I do it screws up my site. So the question is how can I check these sites and/or the files and folders to see if indeed they are infected, or have been breached? I have downloaded all the files with filezilla to my local drive and scanned then with AVG and found nothing. So what is the best way to make sure there are no malicious scripts on my websites or that any of the scripts have been hijacked? They said that someone is using a valid username and password to send junk email but can't tell me how to remedy the situation and that it is my responsibility to get it fixed and so I need some help please--thank you.