Wait a minute. I sure hope you found the hole that let those files in and
closed that hole, or else your computer will be hacked again. I'm guessing
you were hacked through a very commonly known and old vulnerability. It
could be that there is also other bad stuff on your computer. See here:
http://securityadmin.info/faq.htm#ftpfolder
http://securityadmin.info/faq.htm#hacked
http://securityadmin.info/faq.htm#harden
Briefly, if IIS FTP services were running on your computer, either disable
it or make sure the anonymous FTP user [the IUSR account by default] does
not have both read and write permission to any folder, especially those in
the FTProot folder and subfolders.
If IIS FTP services were NOT left running by you, then the hackers remotely
ran commands to install an FTP server like Serv-U FTP. This is bad, because
they could have done anything else they want to your computer, like install
hidden back doors allowing re-entry to your computer later. The second link
above would help you find this out, such as the part mentioning Fport from
www.Foundstone.com/knowledge