Lync 2013 BEX error

keep receiving this error after i download Lync

Problem signature:
  Problem Event Name:BEX
  Application Name:LYNC.EXE
  Application Version:15.0.4517.1004
  Application Timestamp:51b13f00
  Fault Module Name:unknown
  Fault Module Version:0.0.0.0
  Fault Module Timestamp:00000000
  Exception Offset:00000000
  Exception Code:c0000005
  Exception Data:00000008
  OS Version:6.1.7601.2.1.0.256.48
  Locale ID:1033

Additional information about the problem:
  LCID:1033