Give it a go with killbox:
download
KillBox by Option^Explicit from
HERE.
Double click on
Killbox.exe and then check the
delete on reboot button.
Enter the following filepath and filename into the Full path of file to delete box:
C:\Program Files\red storm entertainment\ravenshield\r-r6rstr.exe
Click the
red circle with the white x and allow your computer to reboot.
(if killbox doesn't reboot on its own then please reboot manually)
And if it doesn't work then post a hijackthis log to see if showes there.