Help

I have a problem with a Worm called win32: Trojan-gen

I have Avast, and It keeps telling me that I have this worm but it seems like it can´t get rid of it. What to do?

What file is infected and what is its location?

The file is: C:\msdirectx.sys

The funny thing is that I don´t seem to find it anywere…

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