to uninstall go to the sound icon on task bar choose playback device you will see the item in the list choose it click change settings choose drivers from the tab choose uninstall,you will have to do this for all the virtual cables in the play device list,there might be one that wont let you so reboot then go back in the playback device list and then uninstall.
there are two files in.
C:\windows\system32\drivers\ksthunk.sys
and
C:\windows\system32\drivers\imvac.sys
good luck
Seraphim