Virus won't delete 'ctfmon.exe' and 'autorun.inf' belong to viruses called

these are the options i have tried in order to delete

1) use my anti-virus software to scan through my computer

2) the anti-virus program was unable to delete so i search the file that contains the virus, open the file click on the virus and click delete

3)didn't work. i disconnect internet turn off the computer, turn on the computer and scan again. tried to delete found viruses but still doesn't work. (i guess these viruses automatically start when the system starts then?"

4) so i run msconfig.exe and disable all start up programs and reboot. when computer is rebooted, i look at the startup list and everything is disabled just as i wanted EXCEPT the files called ""ctfmon.exe" and "autorun.inf"

and then now i give up, my external harddrive is also contaminated with these how do i get rid of them? and also, everytime i scan, and try to delete it seems like these viruses move from location to location around my computer files, because the location of the viruses keep changing

Virus won't delete "ctfmon.exe" and "autorun.inf" belong to viruses called "Mal/AutoInf-A" and "Troj/VB-CSA"firewall

click start

click run

type in msconfig

press enter

goto the startup tab

uncheck everything there except your antivirus

press ok (It will ask you if you want to restart your computer ,click restart)