If you have a question , why your visitors landing on my site , you have to know that your site have a malware, and your site are a risk because your sites distributes malware : winupd.exe
You have to search on your server .required hidden directory in your upload directory , check your MySql Database check 3 new tables : 1.db_func 2.db_inst 3.db_user and delete all.
If you need help , please contact me :