List Windows file system filter driver

c:\> fltmc filters

A lot of file protection solutions are implemented as file system filter driver. This includes Symantec AV and Symantec ICSP (BlueCoat)

 Reference(s):
https://serverfault.com/questions/336630/is-there-a-quick-way-to-see-what-filesystem-filter-drivers-are-loaded-on-windows