Windows Explorer freezes on media files

I thought, I'd do some maintainance, so I installed SP2, Windows Media Player 10 and Norton System Works 2005 today.
Now, everytime I (single-) click on an .avi file or just open a folder that contains an .avi file, the explorer freezes.
According to Dr. Watson this is a fault in
Function: ntdll!KiFastSystemCallRet

I attached parts of the log...
I've been searching the net for hours, but couldn't find a solution. Any ideas, anyone?
Thanks,
Airportibo

Anwendungsausnahme aufgetreten:
Anwendung: C:\WINDOWS\Explorer.EXE (pid=1048)
Wann: 17.10.2004 @ 23:47:20.366
Ausnahmenummer: 80000007
()

*----> Systeminformationen <----*
Computername: AIRPORTIBOVAIO
Benutzername: air
Terminalsitzungskennung: 0
Prozessoranzahl: 1
Prozessortyp: x86 Family 6 Model 9 Stepping 5
Windows-Version: 5.1
Aktuelles Build: 2600
Service Pack: 2
Aktueller Typ: Uniprocessor Free
Firma:
...

*----> Statusabbild für Threadkennung 0xf6c <----*

eax=00002011 ebx=00000000 ecx=00000018 edx=777e8540 esi=0007fe84 edi=77f528cd
eip=7c91eb94 esp=0007fe44 ebp=0007fe60 iopl=0 nv up ei pl zr na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000246

*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\WINDOWS\system32\ntdll.dll -
Funktion: ntdll!KiFastSystemCallRet
7c91eb89 90 nop
7c91eb8a 90 nop
ntdll!KiFastSystemCall:
7c91eb8b 8bd4 mov edx,esp
7c91eb8d 0f34 sysenter
7c91eb8f 90 nop
7c91eb90 90 nop
7c91eb91 90 nop
7c91eb92 90 nop
7c91eb93 90 nop
FEHLER ->ntdll!KiFastSystemCallRet:
7c91eb94 c3 ret
7c91eb95 8da42400000000 lea esp,[esp]
7c91eb9c 8d642400 lea esp,[esp]
7c91eba0 90 nop
7c91eba1 90 nop
7c91eba2 90 nop
7c91eba3 90 nop
7c91eba4 90 nop
ntdll!KiIntSystemCall:
7c91eba5 8d542408 lea edx,[esp+0x8]
7c91eba9 cd2e int 2e

*----> Stack Back Trace <----*
*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\WINDOWS\system32\BROWSEUI.dll -
WARNING: Stack unwind information not available. Following frames may be wrong.
*** ERROR: Module load completed but symbols could not be loaded for C:\WINDOWS\Explorer.EXE
*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\WINDOWS\system32\kernel32.dll -
ChildEBP RetAddr Args to Child
0007fe60 75f42245 0007fe84 00000000 00000000 ntdll!KiFastSystemCallRet
0007feb0 0102b499 0009dfb8 01000000 00000000 BROWSEUI!Ordinal106+0x12d
0007ff0c 01023481 01000000 00020648 00000001 Explorer+0x2b499
0007ff5c 0101e2b6 01000000 00000000 00020648 Explorer+0x23481
0007ffc0 7c816d4f 00380036 00340039 7ffde000 Explorer+0x1e2b6
0007fff0 00000000 0101e24e 00000000 78746341 kernel32!RegisterWaitForInputIdle+0x49

*----> Raw Stack Dump <----*
000000000007fe44 9b 91 d1 77 ce 91 d1 77 - 84 fe 07 00 00 00 00 00 ...w...w........
000000000007fe54 00 00 00 00 00 00 00 00 - 00 00 00 00 b0 fe 07 00 ................
000000000007fe64 45 22 f4 75 84 fe 07 00 - 00 00 00 00 00 00 00 00 E ".u............
000000000007fe74 00 00 00 00 00 00 00 00 - 00 00 00 00 00 e0 fd 7f ................
000000000007fe84 b6 00 1a 00 2c c1 00 00 - 01 00 00 00 f0 45 00 01 ....,........E..
000000000007fe94 c8 47 33 00 25 03 00 00 - 82 02 00 00 00 00 00 00 .G3.%...........
000000000007fea4 a0 ff 09 00 01 00 00 00 - 00 00 00 00 0c ff 07 00 ................
000000000007feb4 99 b4 02 01 b8 df 09 00 - 00 00 00 01 00 00 00 00 ................
000000000007fec4 00 00 00 00 80 fb 09 00 - 0a 00 00 00 01 00 00 00 ................
000000000007fed4 00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................
000000000007fee4 00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................
000000000007fef4 00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................
000000000007ff04 00 00 00 00 1c de 00 00 - 5c ff 07 00 81 34 02 01 ........\....4..
000000000007ff14 00 00 00 01 48 06 02 00 - 01 00 00 00 00 e0 fd 7f ....H...........
000000000007ff24 c0 ff 07 00 00 00 00 00 - 24 fd 07 00 50 ff 07 00 ........$...P...
000000000007ff34 e0 ff 07 00 27 e0 91 7c - ed aa 80 7c ff ff ff ff ....'..|...|....
000000000007ff44 0c 00 00 00 39 e6 91 7c - c9 aa 80 7c ff ff ff ff ....9..|...|....
000000000007ff54 0c 00 00 00 64 ff 07 00 - c0 ff 07 00 b6 e2 01 01 ....d...........
000000000007ff64 00 00 00 01 00 00 00 00 - 48 06 02 00 01 00 00 00 ........H.......
000000000007ff74 36 00 38 00 39 00 34 00 - 44 00 00 00 c8 06 02 00 6.8.9.4.D.......

*----> Statusabbild für Threadkennung 0x7d0 <----*

eax=03d24604 ebx=00000000 ecx=03760228 edx=037601d8 esi=7c98c0d8 edi=00000000
eip=7c91eb94 esp=00a8e5d4 ebp=00a8e65c iopl=0 nv up ei pl zr na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000246

Funktion: ntdll!KiFastSystemCallRet
7c91eb89 90 nop
7c91eb8a 90 nop
ntdll!KiFastSystemCall:
7c91eb8b 8bd4 mov edx,esp
7c91eb8d 0f34 sysenter
7c91eb8f 90 nop
7c91eb90 90 nop
7c91eb91 90 nop
7c91eb92 90 nop
7c91eb93 90 nop
ntdll!KiFastSystemCallRet:
7c91eb94 c3 ret
7c91eb95 8da42400000000 lea esp,[esp]
7c91eb9c 8d642400 lea esp,[esp]
7c91eba0 90 nop
7c91eba1 90 nop
7c91eba2 90 nop
7c91eba3 90 nop
7c91eba4 90 nop
ntdll!KiIntSystemCall:
7c91eba5 8d542408 lea edx,[esp+0x8]
7c91eba9 cd2e int 2e

*----> Stack Back Trace <----*
WARNING: Stack unwind information not available. Following frames may be wrong.
*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\WINDOWS\system32\appHelp.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\WINDOWS\system32\SHLWAPI.dll -
*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\WINDOWS\system32\SHELL32.dll -

 

Solution

Finally I found the reason:
It was an incompatibility of Divx with the SP2. To be more precise, the DEP-feature (data execution prevention) of SP2 caused the Windows explorer to crash, when trying to access a divx file.
I deactivated DEP in the c:\boot.ini until I have time to install an updated version of divx.
Details on DEP:
http://support.microsoft.com/default.aspx?scid=kb;en-us;875352

Information on Divx with SP2 and how to deactivate DEP:
http://support.divx.com/cgi-bin/div...WRzb3J0PSZwX3Jvd19jbnQ9MTk0JnBfcGFnZT0x&p_li=

~Airportibo