I just noticed the other day that at the bottom of one of my sites are links about poker and other highly spammy topics. I then noticed I had an old link exchange program in a directory. I went to delete the directory and then a 404 or a 403 would come up for every page request on the site.
There are a few components to the script a user_cfg file, a core.inc file ( this is a big file), an htacess file and a php file which calls the core.inc file.
Any ideas as to how to remove this and allow my site to function normally?