557146 virus has infected my server 2

I had a programmer take a look and here is what he said: Regarding Virus Cleaning attempt : I was Failed Virus affected my systems also. So set-again work took 3+ days. So i did not communicate with you It is 1 type of Trojan virus Virus affect all INDEX, DEFAULT html php files And put a “unauthoried code” That code, running, redirecting ..etc consume lot of server time. Since lot of live sites, in your site, i am afraid to to proceed. If you have a backup of all sites.. then remove all current content .. put from backup. Please some others to carry out this VIRUS CLEARNING WORK