TFTP service not starting in 10.9.1

Version 1

    The TFTP service in 10.9.1 refuse to start on Windows 7 64 bits...  It is reporting a port conflict but there is no UDP 69 or TCP 8099 in use...  After removing 10.9.1, cleaning the registry and installing 10.9.0 with HF1/2/3, TFTP start without problem.  Anybody seen this?