klif.sys

Norton keeps detecting this file in my windows/system32/driver directory.  It deletes it everytime it detects it.  The thing is, whenever i access any of my harddrive, the same window from norton keeps popping up(saying that it has found a virus...and has deleted klif.sys.  I have norton internet security 2006.  I have all the updates and have done a full scan, but no viruses are found.  Any suggestion on how to get rid of it?  I also have trendmicro antispyware installed. Both of them came with the sony laptop.

Thanks