MP3's won't play - crashes media player

Media Player 11 will not play mp3's and get the following each crash:
Problem Event Name:      APPCRASH
Application Name:      wmplayer.exe
Application Version:      11.0.6000.6344
Application Timestamp:      46e5f12e
Fault Module Name:      kernel32.dll
Fault Module Version:      6.0.6000.20608
Fault Module Timestamp:      465cf04b
Exception Code:      c06d007e
Exception Offset:      0001b08e
OS Version:      6.0.6000.2.0.0.768.3
Locale ID:      1033
Additional Information 1:      8d13
Additional Information 2:      cdca9b1d21d12b77d84f02df48e34311
Additional Information 3:      8d13
Additional Information 4:      cdca9b1d21d12b77d84f02df48e34311

Worked OK when purchased Inspiron (2/08) but after a month media player & media center quit playing with no new drivers or software added.  Winamp plays mp3's OK.
Get "unknown audio error 80010105" and following on Windows Media Center  attempting to play mp3:
  Problem Event Name:      APPCRASH
  Application Name:      wmpnetwk.exe
  Application Version:      11.0.6000.6324
  Application Timestamp:      4549b540
  Fault Module Name:      MF.dll
  Fault Module Version:      6.0.6000.16386
  Fault Module Timestamp:      4549bdc9
  Exception Code:      c0000135
  Exception Offset:      00008fc7
  OS Version:      6.0.6000.2.0.0.768.3
  Locale ID:      1033
  Additional Information 1:      9d13
  Additional Information 2:      1abee00edb3fc1158f9ad6f44f0f6be8
  Additional Information 3:      9d13
  Additional Information 4:      1abee00edb3fc1158f9ad6f44f0f6be8

Downloaded Vista Codec Package 4.7 but didn't fix it.
System restore didn't do any good...could only go back 2 months.
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