will not play mp3s

i recently installed sp2 but i don't think that is the root of the problem, i
did however defrag the hard drive and as far as i can tell it may be the
triggered it so that media player won't play mp3 files anymore, when i try to
it pops up the send error report screen, i have reinstalled MP10 multiple
times and it doesn't work still. I can't restore it back before because i
don't have a restore point anymore. the only other cause i can think of is
that it thinks it doesnt have the licenses for the mp3 files even though they
have no licenses attached. But i would think that that wouldn't cause it to
crash. heres the error report:

Event Type: Error
Event Source: Application Error
Event Category: None
Event ID: 1000
Date: 11/17/2004
Time: 12:56:13 AM
User: N/A
Computer: *******
Description:
Faulting application wmplayer.exe, version 10.0.0.3646, faulting module
unknown, version 0.0.0.0, fault address 0x45c7c033.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 41 70 70 6c 69 63 61 74 Applicat
0008: 69 6f 6e 20 46 61 69 6c ion Fail
0010: 75 72 65 20 20 77 6d 70 ure wmp
0018: 6c 61 79 65 72 2e 65 78 layer.ex
0020: 65 20 31 30 2e 30 2e 30 e 10.0.0
0028: 2e 33 36 34 36 20 69 6e .3646 in
0030: 20 75 6e 6b 6e 6f 77 6e unknown
0038: 20 30 2e 30 2e 30 2e 30 0.0.0.0
0040: 20 61 74 20 6f 66 66 73 at offs
0048: 65 74 20 34 35 63 37 63 et 45c7c
0050: 30 33 33 0d 0a 033..

can anyone help me please