How do I get rid of indt2.sys and andt.sys?

Recently I submitted a question about having malware or a virus that causes my computer to sometimes play audio on its own. My antivirus program hadn't detected anything, but people suggested that I use a trial version of Kaspersky and it definitely caught a problem. There are two files which appear to install themselves, indt2.sys and andt.sys and although I have tried quarintine, denying the function, and going in via safe mode and deleting the files, they always come back within a few moments. I'm uming that means some startup file I have is responsible, but they all check out with the antivirus software I've been using. Thanks again!