Error Problem Event BEX

We just downloaded Microsoft Office for Home & Student, and every time I try to open a document in Word or Excel i get the following error:

Problem signature:

  Problem Event Name:BEX
  Application Name:WINWORD.EXE
  Application Version:15.0.4631.1000
  Application Timestamp:5396ace5
  Fault Module Name:unknown
  Fault Module Version:0.0.0.0
  Fault Module Timestamp:00000000
  Exception Offset:0043cb80
  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
  skulcid:1033

How can I fix this??