Quicktime crashes on startup

Question

Greetings!
As of yesterday, my Quicktime/itunes started to act strange. Everytime i try to start QT it crashes with this error message:
  Problem Event Name:
BEX
  Application Name:
QuickTimePlayer.exe
  Application Version:
7.74.80.86
  Application Timestamp:
5180e5b5
  Fault Module Name:
QuickTimePlayer.dll
  Fault Module Version:
7.74.80.86
  Fault Module Timestamp:
5180e597
  Exception Offset:
00005b6d
  Exception Code:
c0000409
  Exception Data:
00000000
  OS Version:
6.1.7601.2.1.0.768.3
  Locale ID:
1044
  Additional Information 1:
11c0
  Additional Information 2:
11c02c20c166ecb702d6f1df8adbc58e
  Additional Information 3:
4c43
  Additional Information 4:
4c439452089776fbffb0639083b57cba
I have tried repairing it, uninstall/re-install etc. but to no avail. The only difference on the PC to my knowledge, is that I installed a soundcard for my new surround headset. Could this be a conflicting factor, or is it just a coinkidinky? And the last thing i did before that was edititing some clips in Adobe After Effects.
Cheers, and please let me know if more information is needed

Answer 1

http://discussions.apple.com/thread.jspa?threadID=1727694&tstart=45
You can also try starting ins Safe Mode to isolate issue of third party drivers.
[Mac OS X: Starting up in Safe Mode|http://docs.info.apple.com/article.html?artnum=107393]
[What is Safe Boot, Safe Mode? (Mac OS X)|http://docs.info.apple.com/article.html?artnum=107392]
[Safe Boot takes longer than normal startup|http://docs.info.apple.com/article.html?artnum=107394]
Safe boot mode runs a directory check command similar to that used by Disk Utility's repair. In Tiger it ignores some stored information (cache) that is normally read that speeds up the boot process, and it moves some other caches to the trash. It also uses only System fonts and disables all Startup Items, third party items, and any Login Items.